And let us not be weary in well doing; for in due season we shall reap, if we faint not.
Galatians 6:9 (KJV)

The end of something is better than its beginning. Not giving up in spirit is better than being proud in spirit.
Ecclesiastes 7:8 (NLV)

He who is slow to anger is better than the powerful. And he who rules his spirit is better than he who takes a city.
Proverbs 16:32 (NLV)

Wait on the Lord; be of good courage, and He shall strengthen your heart; wait, I say, on the Lord.
Psalm 27:14 (NKJV)