I've been reading something called Servants, Misfits, and Martyrs, by James Howell, a Methodist minister. His style is easy and pleasant to read. Here he quotes Dietrich Bonhoeffer:
"We have to learn that personal suffering is a more effective key, a more rewarding principle for exploring the world in thought and action than personal good fortune." Also, "We can have abundant life, even though many wishes remain unfulfilled." And this, "Nothing that we despise in the other man is entirely absent from ourselves...We must learn to regard people less in the light of what they do or omit to do, and more in the light of what they suffer."