Galatians 6:3-5, 7-9

For if anyone thinks he is something when he is nothing, he deceives himself. But each one must examine his own work, and then he will have reason for boasting in regard to himself alone, and not in regard to another. For each one will bear his own load.

Do not be deceived, God is not mocked; for whatever a man sows, this he will also reap. For the one who sows to his own flesh will from the flesh reap corruption, but the one who sows to the Spirit will from the Spirit reap eternal life. Let us not lose heart in doing good, for in due time we will reap if we do not grow weary.