To Obey the Commands of Christ
Then Jesus came near and said to them, “All authority has been given to Me in heaven and on earth.Go, therefore, and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe everything I have commanded you. And remember, I am with you always, to the end of the age.” – Matthew 28:18-20
To Evidence that a Person is a Disciple of Christ
So in Christ Jesus you are all children of God through faith, for all of you who were baptized into Christ have clothed yourselves with Christ. – Galatians 3:26-27
To Follow the Example of Christ
Then Jesus came from Galilee to the Jordan to be baptized by John. But John tried to deter him, saying, “I need to be baptized by you, and do you come to me?” Jesus replied, “Let it be so now; it is proper for us to do this to fulfill all righteousness.” Then John consented. 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. And a voice from heaven said, “This is my Son, whom I love; with him I am well pleased.” – Matthew 3:13-17