A man reaps what he sows. Let us not become weary in doing good, for at the proper time we will reap a harvest if we do not give up. It's a natural law to reap what you sow. It's true in other areas too. If you gossip about your friends, you will lose their friendship.
Every action has results.
If you plant to please your own desires, you'll reap a crop of sorrow and evil. If you plant to please God, you'll reap joy and everlasting life. Don't give up. Don't get discouraged. In due time, you will reap a harvest of blessing.