Madness in great ones must not unwatched go.

The devil knew what he did when he made men politic; he crossed himself by it.

I had rather hear my dog bark at a crow, than a man swear he loves me.

The third day comes a frost, a killing frost.

And therefore, — since I cannot prove a lover, To entertain these fair well-spoken days, — I am determined to prove a villain, And hate the idle pleasures of these days.

I have not slept. Between the acting of a dreadful thing And the first motion, all the interim is Like a phantasma, or a hideous dream: The Genius and the mortal instruments Are then in council; and the state of man, Like to a little kingdom, suffers then The nature of an insurrection.

What's done can't be undone.