The Gospel reading at Mass comes from Matthew 16. Jesus started out asking his disciples, "Who do people say that the Son of Man is?" After they replied, he said to them, "But who do you say that I am?" The answer can only be Peter's "You are the Christ, the Son of the living God" or the denial of it. We are not obligated to answer any questions except for this one, for it is monumental, won't go away, and our eternal destiny hinges upon the answer we give.