History is not the linear sort of movement toward better and better things.
One sees what one wants to see when there is in mind a pre-conceived notion.
A fervently believed idea, even if wrong, dies hard.
Disputes among natural philosophers are of use to science, as the quarrels of the great, and the clamors of the little, are necessary to freedom of thought and the advancement of learning.
It is not easy to fall into any absurdity, unless it be by the length of an account; wherein he may perhaps forget what went before. For all men by nature reason alike, and well, when they have good principles.
I get some letters from girls that if their mothers knew what they were writing me in these letters, they'd get their butts whipped.
I relate to the feeling that Da Vinci was often plagued by the idea that what he did wasn't good enough, that he was his harshest critic. He'd sometimes destroy what he was working on.
You got to fight for quality art and equality and all the things that we're fighting for, the things we believe in. Choice and preference and all those things that we support. We don't want to give up that fight. You got to keep doing it.