"The greatest of evils is to be guilty of none."

"Our inventions are wont to be pretty toys, which distract our attention from serious things. They are but improved means to an unimproved end."

"I love my friends, but I do not want to absorb them."

"The cost of a thing is the amount of what I will call life which is required to be exchanged for it, immediately or in the long run."

"The only obligation which I have a right to assume is to do at any time what I think right."