William James

"Work usually follows will."

"Most men's friendships are too inarticulate."

"Pessimism leads to weakness, optimism to power."

"Life is one long struggle between conclusions based on abstract ways of conceiving cases and opposite conclusions prompted by our instinctive perception of them."

"To change ones life: Start immediately. Do it flamboyantly."

"The question of being is the darkest in all philosophy."