We live by faith
God is the one who makes all of this possible. He has given us his Spirit to make us certain that he will do it. So always be cheerful!
As long as we are in these bodies, we are away from the Lord. But we live by faith, not by what we see. We should be cheerful, because we would rather leave these bodies and be at home with the Lord. But whether we are at home with the Lord or away from him, we still try our best to please him. After all, Christ will judge each of us for the good or the bad that we do while living in these bodies.
2 Corinthians 5:5-10 CEV