A modern-day Moses dialogue, perhaps.

God: "Dude, go get the Israelites."
Moses: "But I suck!"
" 's okay. Go save the Israelites."
"But...I suck!"
" 's okay. I'll give you signs 'n stuff."
"But I still suck."
"I'll send your bro with ya."
"Well..."
"Don't worry. I'll be with you."
"hmm...okay."

(very paraphrased from Exodus)