1 Peter 3:21
Baptism, which is like that water, now saves you. Baptism doesn’t save by removing dirt from the body. Rather, baptism is a request to God for a clear conscience. It saves you through Jesus Christ, who came back from death to life. GWT
I know a group that does proxy baptisms for dead people. The problem is that they are gone. Here in the above translation it seems to me that if baptism is an act of the conscience, I wonder how can we act for someone else’s conscience.