" Though they were very dissimilar in character, they also shared many tastes and appetites, and those they didn’t share they tolerated in each other with instinctive respect, as a necessary spice of difference. They knew each other very well indeed. Her natural tendency was to deplore human failings in others and ignore them in herself; his natural tendency was to understand and forgive human failings in others, and be merciless upon them in himself. She felt herself invincibly strong; he knew himself perilously weak. "

― Colleen McCullough , The Thorn Birds