Who or what was the dovelike form symbolized during Christ’s baptism?

Who or what was the dovelike form symbolized during Christ’s baptism?

Many well meaning Christians believe that the Holy Spirit which, descended upon Christ during His baptism was a distinct, separate personal being. Trinitarians claim that the Father, the Son and the Holy Spirit were all present at the same time at Christ's baptism and therefore constitute a description of Trinity. But there is simply no evidence from the text itself to suggest this... this is purely a reckless eisegesis.

“Spirit of God descending like a dove, and lighting upon him:” (Matt 3:13-17)
“Spirit like a dove descending upon him” (Mark 1:9-11)
“Holy Ghost descended in a bodily shape like a dove upon him” (Luke 3:21-22)

According to Ellen White, the dovelike form is none other than the “Spirit of God[Father]”.

Notice the following quote: “Never before have the angels listened to such a prayer. They are eager to bear to their loved Commander a message of assurance and comfort. BUT NO; THE FATHER HIMSELF WILL ANSWER THE PETITION OF HIS SON. DIRECT FROM THE THRONE ISSUE THE BEAM OF GLORY. The heavens are opened, and upon the Saviour's head descends a dovelike form of purest light,--fit emblem of Him, the meek and lowly One. Of the vast throng at the Jordan, few except John discerned the heavenly vision. Yet the solemnity of the divine Presence rested upon the assembly. The people stood silently gazing upon Christ. His form was bathed in the light that ever surrounds the throne of God. His upturned face was glorified as they had never before seen the face of man. From the open heavens a voice was heard saying, "This is My beloved Son, in whom I am well pleased.”{Desire of Ages p. 112}

“When Christ bowed on the banks of Jordan after His baptism and offered up prayer in behalf of humanity, the heavens were opened; and the Spirit of God, like a dove of burnished gold, encircled the form of the Saviour; and a voice came from heaven which said, “This is my beloved Son, in whom I am well pleased.” {Child Guidance 525.3}
 

"The divinity of Christ was as a hidden treasure. At times when he was upon earth, divinity flashed through humanity, and his true character was revealed. The God of heaven testified to his oneness with his Son. At his baptism the heavens were opened, and the GLORY of God in the similitude of a dove like burnished gold hovered over the Saviour, and a voice came from heaven, saying, “This is my beloved Son, in whom I am well pleased.” {E.G. White, YI Aug 22, 1895}

Thus, according to Spirit of Prophecy, the dove-like form ("purest light", "burnished gold") was non other than the Father's own Spirit which came directly from His throne as an emblem representing Christ's character( "fit emblem of Him, the meek and lowly One").

Holy Spirit is the omnipresence of either the Father or the Son in their own Spirit:

“BY THE SPIRIT the Father and the Son will come and MAKE THEIR ABODE WITH YOU. [John 14:23 quoted]” — (E.G. White, BEcho, Jan 15, 1893)

Psalms 139: 7-10 “Whither shall I go from thy spirit? or whither shall I flee from thy presence? 8 If I ascend up into heaven, thou art there: if I make my bed in hell, behold, thou art there. 9 If I take the wings of the morning, and dwell in the uttermost parts of the sea; 10 Even there shall thy hand lead me, and thy right hand shall hold me.”

Psalms 51:11 “Cast me not away from thy presence; and take not thy holy spirit from me.

While Christ was on earth, He gave up his omnipresence but the Father was still omnipresent by His own Spirit. It is the Father's Spirit that descended upon Christ as SOP describes.

After Christ's ascension, the Comforter comes to us as the Spirit of Christ; the Father's Spirit is in Christ and it is through the medium of Christ's own Spirit that the Holy Spirit comes to us.

"I will not leave you comfortless: I will come to you." Jn 14:18

"If a man love me, he will keep my words: and my Father will love him, and WE will come unto him, and make OUR abode with him." Jn 14:23

" I[Christ] in them, and thou[Father] in me" Jn 17:23