I must have a prodigious quantity of mind; it takes me as much as a week sometimes to make it up.

Always acknowledge a fault frankly. This will throw those in authority off their guard and give you opportunity to commit more.

They spell it 'Vinci' and pronounce it 'Vinchy'. Foreigners always spell better than they pronounce.

I do not take any credit to my better-balanced head because I never went crazy on Presbyterianism. We go too slow for that. You never see us ranting and shouti…

The mind moves by instincts, associations and premonitions and not by fixed dates or completed processes. Action and reaction will occur simultaneously: or the…

Invention flags, his brain goes muddy, And black despair succeeds brown study.

I'm in a constant process of thinking about things. I'll think about things for thirty or forty years before I'll write it.