Galatians 6:9 (NIV) Let us not become weary in doing good, for at the proper time we will reap a harvest if we do not give up.
Philippians 1:27 (NIV) Whatever happens, conduct yourselves in a manner worthy of the gospel of Christ. Then, whether I come and see you or only hear about you in my absence, I will know that you stand firm in one spirit, contending as one man for the faith of the gospel.
Hebrews 12:1 (NIV) Therefore, since we are surrounded by such a great cloud of witnesses, let us throw off everything that hinders and the sin that so easily entangles, and let us run with perseverance the race marked out for us.
"Do not let what you cannot do interfere with what you can do." —John Wooden
Elesha Hodge, comp., Today's Best Illustrations – Volumes 1-4, (Carol Stream, IL: Christianity Today, 1997), WORDsearch CROSS e-book, Under: "WEAKNESS".