The highest truth needs no communicating, for it is by its very nature self-propelling. It radiates its influence silently as the rose its fragrance without the intervention of a medium.

I am, and have been for years, a confirmed anti-vaccinationist...I have not the least doubt in my mind that vaccination is a filthy process that is harmful in the end.

Tolerance gives us spiritual insight, which is as far from fanaticism as the north pole is from the south.

The right to err, which means the freedom to try experiments, is the universal condition of all progress.

I should love to satisfy all, if I possibly can; but in trying to satisfy all, I may be able to satisfy none. I have, therefore, arrived at the conclusion that the best course is to satisfy one’s own conscience and leave the world to form its own judgment, favorable or otherwise.

When you are right,you have no need to be angry. When you are wrong, you have no right to be angry.

Let hundreds like me perish, but let truth triumph.