He preaches well that lives well

A knight errant who turns mad for a reason deserves neither merit nor thanks. The thing is to do it without cause

And thus being totally preoccupied, he rode so slowly that the sun was soon glowing with such intense heat that it would have melted his brains, if he'd had any.

Love and war are the same thing, and stratagems and policy are as allowable in the one as in the other.

God bears with the wicked, but not forever.

I can tell where my own shoe pinches me.

Take away the cause, and the effect ceases.