en_obs-tn/content/44/05.md

Peter continues to preach to the crowd.

author of life

That is, "the one who created life" or, "the one who gives us life" or, "the one who causes people to live." This refers to Jesus.

your actions

This can also be translated as, "the things you did." This refers to their asking Pilate to kill Jesus.

turn to God

That is, "decide to obey God."

your sin will be washed away

This could be translated as, "God will wash away your sins" or, "God will take away your sins and make you clean." This is talking about God purifying people in their spirit by completely removing their sins. It does not mean physical washing.