Everything starts in the heart. And God sees the heart. We may fool man, but we will not fool God. A surrendered heart will allow God to use us.
The cross is in view. And Jesus is trusting God's plan. Will Peter trust God's plan? Will we trust God's plan?
God's covenant with David is fulfilled through Jesus. God will always do what He says. All the promises of God are fulfilled in Jesus.
The last thing Jesus does with His disciples is to pray for them. What does Jesus pray about? What is on His heart as He is about to leave them?