Without freedom of thought, there can be no such thing as wisdom - and no such thing as public liberty without freedom of speech.
The truth is incontrovertible. Malice may attack it, ignorance may deride it, but in the end, there it is.
How many legs does a dog have if you call his tail a leg? Four. Saying that a tail is a leg doesn't make it a leg.
No man has a good enough memory to be a successful liar.
I am not bound to win, but I am bound to be true. I am not bound to succeed, but I am bound to live by the light that I have. I must stand with anybody that stands right, and stand with him while he is right, and part with him when he goes wrong.
The calmed say that what is well-spoken is best; second, that one should say what is right, not unrighteous; third, what's pleasing, not displeasing; fourth, what is true, not false.
Ethical axioms are found and tested not very differently from the axioms of science. Truth is what stands the test of experience.
If you are out to describe the truth, leave elegance to the tailor.
Prejudice is a burden that confuses the past, threatens the future and renders the present inaccessible.