Different men view the same things in different ways. And the same men in the course of a few years alter their whole view of life. They have simply changed their companions on the road. Indeed the breaking with one set of people and the forming ties of friendship with others of a different type is often but the outward evidence and result of a hidden and inward change of the more intimate friendships of the mind.
Basil W. Maturin, Self-Knowledge and Self-Discipline
friendship, perspective