The professional has learned that success, like happiness, comes as a by-product of work. The professional concentrates on the work and allows rewards to come or not come, whatever they like. Steven Pressfield
I see happiness as a by-product. I don't think you can pursue happiness. I think that phrase is one of the very few mistakes the Founding Fathers made. James Hillman
Wealth, like happiness, is never attained when sought after directly. It comes as a by-product of providing a useful service. Henry Ford
You can't go around making plans that have you getting killed as a by-product. Eventually one of them is going to. Holly Black