"Every form of addiction is bad, no matter whether the narcotic be alcohol or morphine or idealism."

"The first half of life is devoted to forming a healthy ego, the second half is going inward and letting go of it."

"Life calls us to change, and it is a painful process."

"Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not."

"One cannot be too careful in the choice of one's enemies."