Every single person at some point in their life has to wrestle with this question or at least wrestle with who Jesus is. Both of those questions are similar. We don't have to do anything for our salvation because Christ did it all for us already. He lived the perfect life we can't. He took the punishment for sin. He rose from the dead, conquering death. This is what is revealed to us about Jesus in God's Word. It is with that Word that God creates faith in the heart, the faith that saves.