I've been thinking of a story from the Old Testament: Moses stood all day and all night with outstretched arms, praying to God for victory. And whenever he let down his arms, the enemy prevailed over the children of Israel. Are there still people today who never weary of directing all their thinking and all their energy, single-heartedly, to one cause?

As quoted in Seeking Peace : Notes and Conversations Along the Way (2000) by Johann Christoph Arnold, p. 155