Acts 11:16 Then I remembered the word of the Lord, how He said, ‘John indeed baptized with water, but you shall be baptized with the Holy Spirit.’
The difference between being baptized with water and baptized with the Holy Spirit is one we should be reminding people of, just as Peter was reminding the disciple here.
Baptizing with water is a sign of the inner baptism which should be taking place; the real act of giving your life to Christ and being re-born free from your sins.
Remember it was Christ who gave His life for us and we are the ones who choose to follow in His footsteps, though He does not call us to give our physical lives, just to show others we are willing.