Angels are inferior to Christ but serve as God's messengers

Hebrews 1:4-7 So he became as much superior to the angels as the name he has inherited is superior to theirs. For to which of the angels did God ever say, ‘You are my Son; today I have become your Father’? Or again, ‘I will be his Father, and he will be my Son’? And again, when God brings his firstborn into the world, he says, ‘Let all God’s angels worship him.’ In speaking of the angels he says, ‘He makes his angels spirits, and his servants flames of fire.’ 

Christ's name is superior to that of the angles as although they are referred to as the sons of God at times, he alone is the Son of God. This is fitting because although he was made a little lower than the angels in the incarnation he became as much superior to the angels as the name he has inherited is superior to theirs. The very fact that all the angels worshipped the incarnate Son shows that he is God. (If all were worshipping the Son then none were doing anything else). Angels, in distinction from the Son of God, are like wind and thunder. They are messengers bringing God's message to earth. Like the wind they are invisible and like the lightning they are glorious. They are swift messengers from heaven.

Angels came and attended Jesus tempted in the wilderness

Matthew 4:11 Then the devil left him, and angels came and attended him.

Gill says that these angels came to Jesus in a visible, human form, as they were used to do under the Old Testament dispensation, which seems likely. It happened after the temptation was over; after Satan was foiled, and was gone. The timing shows that Christ alone had got the victory over him, without any help or assistance from the angels. Gill understands them as bringing him food of their own, as with Elijah, (1 Kings 19:5,-8) to satisfy his hunger and refresh him

Thus, says Gill, as the angels are ministering spirits to the heirs of salvation, both in a temporal and in a spiritual sense, (Hebrews 1:14 ) so they were to Christ. Nothing is more frequent with the Jews than to call the angels "ministering angels".

Spurgeon says that the enemy left him when he had shot his last bolt ... for a season .... So soon as the evil one had departed, angels appeared to fulfil a ministry for which they eagerly longed, but which the presence of the devil hindered. No doubt they had been hovering near, waiting their opportunity. These holy beings might not come upon the scene while the battle was being fought, lest they should seem to divide the honours of the day; but when the duel was ended, they hastened to bring food for the body and comfort for the mind of the champion King. It was a battle royal, and the victory deserved to be celebrated by the courtiers of the heavenly King. Let us behold, these angels, learn from their example, and believe that they are also near to all the warriors of the cross in their hour of conflict with the fiend. O Tempted but Triumphant King, thy servants worship thee, and ask permission and grace to minister to thee as angels did!

Mark 1:13 is parallel
and he was in the wilderness forty days, being tempted by Satan. He was with the wild animals, and angels attended him. 

Angels are very interested in gospel matters

1 Peter 1:12 It was revealed to them [the prophets] that they were not serving themselves but you, when they spoke of the things that have now been told you by those who have preached the gospel to you by the Holy Spirit sent from heaven. Even angels long to look into these things.

It is clear from Scripture that there is no salvation for fallen angels. They are very interested in anything to do with the salvation of human beings, nevertheless. They appear to be eager Bible students. It is not clear how Peter knows this.

Jamieson, Fausset and Brown say that these things are "the things now reported unto you" by the evangelistic preachers "Christ's sufferings and the glory that should follow" (1:11, 12 ). Tehy say that angels do not any more than ourselves possess an intuitive knowledge of redemption. "To look into" in Greek is literally, "to bend over so as to look deeply into and see to the bottom of a thing." As the cherubim stood bending over the mercy seat, the emblem of redemption, in the holiest place, so the angels intently gaze upon and desire to fathom the depths of "the great mystery of godliness, God manifest in the flesh, justified in the Spirit, seen of angels" (1 Timothy 3:16 ). Their "ministry to the heirs of salvation" naturally disposes them to wish to penetrate this mystery as reflecting such glory on the love, justice, wisdom, and power of their and our God and Lord. They can know it only through its manifestation in the Church, as they personally have not the direct share in it that we have. They quote Hofman in Alford, "Angels have only the contrast between good and evil, without the power of conversion from sin to righteousness: witnessing such conversion in the Church, they long to penetrate the knowledge of the means whereby it is brought about".

Angels will accompany Christ when he returns

Matthew 16:27 For the Son of Man is going to come in his Father’s glory with his angels, and then he will reward each person according to what they have done.

Mark 8:38 If anyone is ashamed of me and my words in this adulterous and sinful generation, the Son of Man will be ashamed of them when he comes in his Father’s glory with the holy angels.

Luke 9:26 Whoever is ashamed of me and my words, the Son of Man will be ashamed of them when he comes in his glory and in the glory of the Father and of the holy angels.

Matthew Poole says that Luke repeats the first two most perfectly, as here recorded. Mark expounds Luke’s words, where he saith that Christ shall come in his own glory, and in his Father’s and of the holy angels. By the glory of the holy angels is meant no more than attended by the holy angels, according to Matthew 13:41 and 1 Thessalonians 4:16 and other scriptures.

1 Thessalonians 4:16 says

For the Lord himself will come down

with a loud command,

with the voice of the archangel and

with the trumpet call of God,

and the dead in Christ will rise first.

There appears to be some parallelism here - the loud command is the voice of an archangel and can be pictured as the trumpet call of God. Christ calls the dead from their graves. He does so by sending his holy angels, led by the archangel, to gather the elect.

At the same time (Matthew 13:41) the angels will weed out all evil

The Son of Man will send out his angels, and they will weed out of his kingdom everything that causes sin and all who do evil.

Angels will be weeders out and harvesters at the end

Matthew 13:39, 41, 49 ... and the enemy who sows them is the devil. The harvest is the end of the age, and the harvesters are angels. ...

The Son of Man will send out his angels, and they will weed out of his kingdom everything that causes sin and all who do evil. ...

This is how it will be at the end of the age. The angels will come and separate the wicked from the righteous

We learn in this parable that the angels will be the harvesters of people at the end of the age. Sent by Christ they will weed out everything that causes sin and all who do evil. .. They will separate the righteous from the wicked at the end.

Spurgeon says on these verses

Now is the time of growing: the harvest hastens on, and the reapers are already chosen by the great householder. We may rejoice that angels, and not men, are the reapers. At what hour the consummation of the age (RV) shall come we do not know, but it is surely drawing nigh. ... This the Son of man will do with authority; the angels are simply the executioners of the wrath of the Lamb. ... The separation between “the wicked” and “the just”, who are in the kingdom, will be at the close of the dispensation. It will be accomplished by the messengers of God, the appointed angels: it will be done infallibly, readily, fully, and finally. The doom of the wicked is described in terms which are terrible to the last degree. ....

Matthew Henry says

The reapers are the angels: they shall be employed, in the great day, in executing Christ’s righteous sentences, both of approbation and condemnation, as ministers of his justice, ch. 25:31. The angels are skillful, strong, and swift, obedient servants to Christ, holy enemies to the wicked, and faithful friends to all the saints, and therefore fit to be thus employed. He that reapeth receiveth wages, and the angels will not be unpaid for their attendance; for he that soweth, and he that reapeth, shall rejoice together (Jn. 4:36 ); that is joy in heaven in the presence of the angels of God.

The angels of heaven shall come forth to do that which the angels of the churches could never do; they shall sever the wicked from among the just; and we need not ask how they will distinguish them when they have both their commission and their instructions from him that knows all men, and particularly knows them that are his, and them that are not, and we may be sure there shall be no mistake or blunder either way.

Angels shouted for joy when God created the world

Job 38:6, 7 On what were its footings set, or who laid its cornerstone - while the morning stars sang together and all the angels shouted for joy?

God questions Job as to where he was when God created the world. This leads to the reference to the angels adn creation. We know that the angels and all heavenly creatures were created before the creation of this world. Here we learn that the angels shouted for joy when God created the world. The morning stars must be another way to refer to the angels. Jesus is the bright and morning star (Revealtion 22:16) and they are morning stars. Stars speak of glory, purity and light and of constancy, permanency and the numbers points to the fact there are so many angels.

It is rare to find a reference to angels singing in Scripture but that is the implication here. Perhaps the cause of their rejoicing was the anticipation of the work of salvation for which this earth forms the theatre. It may have been simply to do with the creation itself.