2 Corinthians 12:9, 10 — "But he said to me, 'My grace is sufficient for you, for my power is made perfect in weakness.' . . . For the sake of Christ, then, I am content with weaknesses . . . . For when I am weak, then I am strong."
Forget about being strong as you teach and preach today. Be weak. That's the right place to be if you want God to use you.