The entire function of man is to survive. The outermost limit of endeavour is creative work. Anything less is too close to simple survival until death happens along. So I am engaged in striving to maintain equilibrium sufficient to at least realize survival in a way to astound the gods.
A letter to his wife Polly in October 1938. "Bare-faced Messiah: The True Story of L. Ron Hubbard" by Russell Miller, p. 81, 1987.