Every action needs to be prompted by a motive.

Any color is more distinctly seen when opposed to its contrary: thus, black on white, blear near yellow, green near red, and so on.

Great love is born of great knowledge of the thing that is loved, and if you do not know it, you can love it little or not at all.

Your brain is much better than you think; just use it!

I have offended God and mankind because my work didn't reach the quality it should have.

You do ill if you praise, but worse if you censure, what you do not understand.

Those who, in debate, appeal to their qualifications, argue from memory, not from understanding.