Why Did Jesus Preach to Spirits in Prison?
Peter ties Christ's proclamation to spirits in prison to his once-for-all suffering for sins, not to a second chance after death. The passage announces completed victory and leaves the content and response unstated.
1 Peter 3:20–21: Noah's Flood and Baptism
Peter does not make the flood the center of his argument. He points past the water to the risen Christ, who brings sinners to God and gives a good conscience before him.