Jas 2:14-18:
What good is it, my brothers and sisters, if someone says he has faith but does not have works?

Can that faith save him? If a brother or sister has nothing to wear and has no food for the day, and one of you says to them, “Go in peace, keep warm, and eat well, ” but you do not give them the necessities of the body, what good is it? So also faith of itself, if it does not have works, is dead.

Indeed someone might say, “You have faith and I have works.” Demonstrate your faith to me without works, and I will demonstrate my faith to you from my works.

 Mk 8:27-35:
Jesus and his disciples set out for the villages of Caesarea Philippi. Along the way he asked his disciples, “Who do people say that I am?” They said in reply, “John the Baptist, others Elijah, still others one of the prophets.” And he asked them, “But who do you say that I am?” Peter said to him in reply, “You are the Christ.” Then he warned them not to tell anyone about him.

He began to teach them that the Son of Man must suffer greatly and be rejected by the elders, the chief priests, and the scribes, and be killed, and rise after three days. He spoke this openly. Then Peter took him aside and began to rebuke him. At this he turned around and, looking at his disciples, rebuked Peter and said, “Get behind me, Satan. You are thinking not as God does, but as human beings do.”

He summoned the crowd with his disciples and said to them, “Whoever wishes to come after me must deny himself, take up his cross, and follow me. For whoever wishes to save his life will lose it, but whoever loses his life for my sake and that of the gospel will save it.”

Peter professes his faith in Jesus but does not understand as Jesus predicts his passion. Jesus gives a teaching on discipleship. Notice the exchange with Peter. How does it differ from the section in Matthew 16 where Jesus gives Peter the keys to the kingdom of heaven? Just because a person has grown up with Jesus does not mean the person has accepted Jesus. Pray for the grace to accept the teachings of Jesus, even when they seem difficult. Pick up the daily cross of living. Do not complain about your life situation. You can always find someone who is worse off than you are.