Mark 1:10

A dove—a tame, innocent and simple bird. Hence we are taught to copy the innocence of doves.

The Holy Spirit came in the form of a dove in order that the nature of the Holy Spirit might be made plain by means of a creature of utter simplicity and innocence. For the dove's body has no gall in it. So after the deluge, by which the iniquity of the old world was purged away, after, so to speak, the baptism of the world, the dove as herald proclaimed to the earth the tempering of the wrath of heaven—sent forth from the ark and returning with an olive branch, which is a sign of peace among the nations.

(Vict. Ant. e Cat. in Marc.) Or else, that from heaven sanctification might be given to men, and earthly things be joined to heavenly. But the Holy Spirit is said to have descended upon Him, not as if He then first came to Him, for He never had left Him; but that He might show forth the Christ, Who was preached by John, and point Him out to all, as it were by the finger of faith.

But why in the form of a dove? The dove is a gentle and pure creature. Since then the Spirit, too, is "a Spirit of gentleness," he appears in the form of a dove, reminding us of Noah, to whom, when once a common disaster had overtaken the whole world and humanity was in danger of perishing, the dove appeared as a sign of deliverance from the tempest, and bearing an olive branch, published the good tidings of a serene presence over the whole world. All these things were given as a type of things to come.… In this case the dove also appeared, not bearing an olive branch, but pointing to our Deliverer from all evils, bringing hope filled with grace. For this dove does not simply lead one family out of an ark, but the whole world toward heaven at her appearing. And instead of a branch of peace from an olive tree, she conveys the possibility of adoption for all the world's offspring in common.

To appear denotes a sensible effect with express signification, as the Holy Spirit appeared in a dove. And since, just as the divine persons are distinct, so they can be distinctly signified both by signs and by names, therefore any person can appear by itself, …

But this is the anointing of Christ according to the flesh, namely, the Holy Ghost, of which anointing it is said, God, even thy God, hath anointed thee with the oil of gladness above thy fellows. (Ps. 45:8) Again, the Holy Ghost came down in the shape of a dove, because in the Canticles it is sung of the Church: (Cant. passim.) My bride, my love, my beloved, my dove. Bride in the Patriarchs, love in the Prophets, near of kin in Joseph and Mary, beloved in John the Baptist, dove in Christ and His Apostles: to whom it is said, Be ye wise as serpents, and harmless as doves. (Mat. 10:16)

The image of a dove is placed before us by God so that we may learn the simplicity favored by him. So let us meditate on the nature of the dove, that from each one of its features of innocence we may learn the principles …

And immediately ascending out of the water He saw the heavens opened, etc. The mystery of the Trinity is demonstrated in the baptism of the Lord. The Lord is baptized, the Spirit descends in the form of a dove, and the voice of the Father …

(in Marc. i. 4) And straightway coming up out of the water, he saw the heavens opened, and the Holy Spirit like a dove descending, and resting upon him. But the heavens are opened, not by the unclosing of the elements, but to the eyes of the spirit, to which Ezekiel in the beginning of his book relates that they were opened; (Ezek. 1.) or this His seeing the heavens opened after baptism was done for our sakes, to whom the door of the kingdom of heaven is opened by the laver of regeneration.

(ubi sup.) This event also, in which the Holy Ghost was seen to come down upon baptism, was a sign of spiritual grace to be given to us in baptism.

(ubi sup.) Well indeed in the shape of a dove did the Holy Ghost come down, for it is an animal of great simplicity, and far removed from the malice of gall, that in a figure He might show us that He looks out for simple hearts, and deigns not to dwell in the minds of the wicked.

The Spirit descends not because Christ had need of this (for by nature He abides in Him), but so that you might know that the Holy Spirit descends upon you also at baptism. And the heavens are opened so that we might know that they …

Morally also it may be interpreted; we also, drawn aside from the fleeting world by the smell and purity of flowers, run with the young maidens after the bridegroom, (v. Cant. 1:2. 3.) and are washed in the sacrament of baptism, from the two fountains of the love of God, and of our neighbour, by the grace of remission, and mounting up by hope gaze upon heavenly mysteries with the eyes of a clean heart. Then we receive in a contrite and lowly spirit, with simplicity of heart, the Holy Spirit, who comes down to the meek, and abides in us, by a never-failing charity. And the voice of the Lord from heaven is directed to us the beloved of God; Blessed are the peacemakers, for they shall be called the sons of God; (Matt. 5:9) and then the Father, with the Son and the Holy Spirit, is well-pleased with us, when we are made one spirit with God.

And straightway coming up out of the water,....

This passage is singularly full of matter. It is a striking instance of that brevity of style, which is the peculiar characteristic of Mark's Gospel. The baptism of our Lord, His temptation in the wilderness, the commencement of his preaching, and the calling of His first disciples are related here in eleven verses. Let us notice, in the first place, the voice from heaven which was heard at our Lord's baptism. We read, "There came a voice from heaven, saying, You are my beloved Son, in whom I am well pleased." That voice was the voice of God the Father.

This passage is singularly full of matter. It is a striking instance of that brevity of style, which is the peculiar characteristic of Mark's Gospel. The baptism of our Lord, His temptation in the wilderness, the commencement of his preaching, and the calling of His first disciples are related here in eleven verses. Let us notice, in the first place, the voice from heaven which was heard at our Lord's baptism. We read, "There came a voice from heaven, saying, You are my beloved Son, in whom I am well pleased." That voice was the voice of God the Father. It declared the wondrous and ineffable love which has existed between the Father and the Son from all eternity. "The Father loves the Son, and has given all things into His hand." (John 3:35.) It proclaimed the Father's full and complete approbation of Christ's mission to seek and save the lost. It announced the Father's acceptance of the Son as the Mediator, Substitute, and Surety of the new covenant. There is a rich mine of comfort, in these words, for all Christ's believing members. In themselves, and in their own doings, they see nothing to please God. They are daily sensible of weakness, shortcoming, and imperfection in all their ways. But let them recollect that the Father regards them as members of His beloved Son Jesus Christ. He sees no spot in them. (Cant. 4:7.) He beholds them as "in Christ," clothed in His righteousness, and invested with His merit. They are "accepted in the Beloved," and when the holy eye of God looks at them, He is "well pleased." Let us notice, in the second place, the nature of Christ's preaching. We read that he came saying, "Repent, and believe the Gospel." This is that old sermon which all the faithful witnesses of God have continually preached, from the very beginning of the world.