"Once we get God's comission, we cannot be content"

"It is interesting to note that once Moses climbs Mt. Sinai and talks to God there is never contentment for him again. That is the way it is with us. Once we talk to God, once we get his commission to us for our lives we cannot be again content. We are happier. We are busier. But we are not content because then we have a mission -- a commission, rather."

Three guesses who said it.