Why be baptized?

To follow Christ’s example
At that time Jesus came from Nazareth and was baptized by John in the river. Mark 1:9

To obey Christ’s command
Jesus said, “Go then, to all people everywhere and make them my disciples, baptize them in the name of the Father, the Son, and the Holy Spirit, and then teach them to obey everything I have commanded you.” Matthew 28:19–20

To show you are a believer
...many of the Corinthians who heard him believed and were baptized.
Acts 18:8

To show that you know Christ
We know that we have come to know Him, if we obey His commands.
1 John 2:3