Luke 3:21

“Now when all the people were baptized, etc.] That came from several parts to John for this purpose, even as many as he judged to be proper subjects of that ordinance, as many of the common people, publicans, soldiers, etc. it came to pass that Jesus also being baptized; of John in Jordan, he coming from Galilee thither on that account: and praying; after he was baptized, for the coming down of the Spirit upon him, as man, to anoint, and qualify him for his office he was now about to enter on publicly: and for success in it, and for a testimony from heaven, that he was the Son of God, and true Messiah: the heaven was opened; (see Gill on “<400316>Matthew 3:16”).”

“BAPTISM OF AND DESCENT OF THE SPIRIT UPON JESUS. (Luk 3:21-22) when all the people were baptized--that He might not seem to be merely one of the crowd. Thus, as He rode into Jerusalem upon an ass, "whereon yet never man sat" (Luk 19:30), and lay in a sepulchre "wherein was never man yet laid" (Joh 19:41), so in His baptism He would be "separate from sinners."”

“See the notes at Matthew 3:13-17. “Jesus being baptized;” or, Jesus “having been” baptized. This took place after the baptism, and not “during” its administration, Matthew 3:16. Praying - This circumstance is omitted by the other evangelists; and it shows, That Jesus was in the habit of prayer. That it is proper to offer up special prayer at the administration of the ordinances of religion. That it is possible to pray in the midst of a great multitude, yet in secret. The prayer consisted, doubtless, in lifting up the heart silently to God. So “we” may do it anywhere - about our daily toil - in the midst of multitudes, and thus may pray “always.” Luke 3:22 In a bodily shape - This was a real…”

“Jesus praying, the heaven was opened - It is observable, that the three voices from heaven, see Luk 9:29, Luk 9:35; Joh 12:28; by which the Father bore witness to Christ, were pronounced either while he was praying, or quickly after it. Mat 3:13; Mar 1:9. Luke 3:23”

“3:21-22 Jesus’ baptism marked the beginning of his public ministry and his anointing as the Messiah (the “Anointed One”). The voice of God from heaven confirmed Jesus’ identity and mission. 3:21 As he was praying: Luke emphasizes Jesus’ trust and reliance on God in prayer (5:16; 6:12; 9:18, 28; 11:1; 22:32, 41, 44; 23:34, 46). • the heavens opened: This image was a sign of God’s presence (Isa 64:1), divine revelation (Ezek 1:1; John 1:51), and the end of an age (Rev 4:1; 15:5; 19:11).”

“that: Mat 3:13-15; Mar 1:9; Joh 1:32-34 and praying: Luk 9:28, Luk 9:29; Joh 12:27, Joh 12:28 the heaven: Mat 3:16, Mat 3:17; Mar 1:10; Joh 1:32-34 Luke 3:22”