Thanks for your question.

All the sins of the world were transferred to Jesus through His baptism. But it does not mean that He became sinful. Sins were not transferred to His Spirit, but just to His flesh. Jesus was sent to the earth in the flesh of a man. It means He put on a human flesh while He is God. So He just bore the sins of the world on His flesh as God.

See Isaiah 53:6, "the LORD has laid on Him the iniquity of us all." So all sins were really laid on Jesus through His baptism. Romans 8:3 also says, "For what the law could not do in that it was weak through the flesh, God did by sending His own Son in the likeness of sinful flesh, on account of sin: He condemned sin in the flesh."

Jesus bore all the sins of the world through His baptism and carried them to the Cross. During His public ministry, He was bearing the sins before being crucified at the Cross. So the Bible said, "Then Jesus came with them to a place called Gethsemane, and said to the disciples, 'Sit here while I go and pray over there.' And He took with Him Peter and the two sons of Zebedee, and He began to be sorrowful and deeply distressed. Then He said to them, 'My soul is exceedingly sorrowful, even to death. Stay here and watch with Me.' He went a little farther and fell on His face, and prayed, saying, 'O My Father, if it is possible, let this cup pass from Me; nevertheless, not as I will, but as You will ' " (Matthew 26:36-39).

Philippians 2:6-8 states, "Let this mind be in you which was also in Christ Jesus, who, being in the form of God, did not consider it robbery to be equal with God, but made Himself of no reputation, taking the form of a bondservant, and coming in the likeness of men. And being found in appearance as a man, He humbled Himself and became obedient to the point of death, even the death of the cross."

Jesus had to be crucified in order to fulfill the will of the Father even though it was very painful. The reason Jesus was crucified was that He bore all the sins of the world when He was baptized by John the Baptist. So He said, "It is finished" when He died at the Cross (John 19:30). The baptism of Jesus and His Cross are very closely related each other. These two make the complete salvation.

So the baptism of Jesus is not merely a symbol, which many people say like that, but the antitype of salvation.