Between the Extremes, p. 159

“The real question is whether we can learn anything from our experiences upon which we may grow and help others to grow in the likeness and image of God.

“We know that if we rebel against doing that which is reasonably possible for us, then we will be penalized. And we will be equally penalized if we presume in ourselves a perfection that simply is not there.

“Apparently, the course of relative humility and progress will have to lie somewhere between these extremes. In our slow progress away from rebellion, true perfection is doubtless several millennia away.”

Letter, 1959