2Sarah R = "13 Then Jesus came from Galilee to the Jordan to be baptized by John. 14 But John tried to deter him, saying, “I need to be baptized by you, and do you come to me?”15 Jesus replied, “Let it be so now; it is proper for us to do this to fulfill all righteousness.” Then John consented.16 As soon as Jesus was baptized, he went up out of the water. At that moment heaven was opened, and he saw the Spirit of God descending like a dove and alighting on him. 17 And a voice from heaven said, “This is my Son, whom I love; with him I am well pleased.”Matthew 3:13-17 (also recorded in the other gospels)"
3Sarah R = "The Holy Spirit, when He assumes a visible form, assumes that which will be symbolic of the thing to be represented. At Pentecost, He assumed the form of “tongues of fire” (Acts 2:30) to signify the miraculous powers of language with which the apostles would be endowed and the power of their message. In the same way, His appearance as the dove symbolizes the gentle Savior bringing peace to mankind through His sacrifice.Read more:http://www.gotquestions.org/Holy-Spirit-dove.html#ixzz3Zvtq6Xs1"