"The great thing in the world is not so much to seek happiness as to earn peace and self-respect."

"The more rapidly truth is spread among mankind the better it will be for them. Only let us be sure that it is the truth."

"Every great advance in natural knowledge has involved the absolute rejection of authority."

"It is one of the most saddening things in life that, try as we may, we can never be certain of making people happy, whereas we can almost always be certain of making them unhappy."

"The best way to enhance freedom in other lands is to demonstrate here that our democratic system is worthy of emulation."

"It is necessary for him who lays out a state and arranges laws for it to presuppose that all men are evil and that they are always going to act according to the wickedness of their spirits whenever they have free scope."

"Necessity is blind until it becomes conscious. Freedom is the consciousness of necessity."

"I've returned to being an amateur without any ties or strings attached, which gives me a freedom I never had before."