Do not be deceived, God is not mocked;
for whatever a person 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. 

Galatians 6:7-9 NASB