Don't do what you want. Do what you don't want. Do what you're trained not to want. Do the things that scare you the most.

Don't do unto others what you don't want done unto you.

Never do anything if it means you can’t sleep at night.

Never do what they expect,

What you don´t want done to yourself, do not do to others.

Do not dare not to dare.

Die, my dear? Why that's the last thing I'll do!

I never do anything I don't want to do. Nor does anyone, but in my case I am always aware of it.

I will never do this, says one, yet does it: I am resolved to do this, says another; but flags upon second Thoughts: Or does it, tho’ awkwardly, for his Word’s sake: As if it were worse to break his Word, than to do amiss in keeping it.

If I could not be persuaded into doing what I thought wrong, I will never be tricked into it.

He never does a proper thing without giving an improper reason for it.

Resolved, never to do anything which I should be afraid to do if it were the last hour of my life.

Decidedly it will never have been given to me to finish anything, except perhaps breathing. One must not be greedy.

There’s no way to do that, Miss Archer. I won’t say that if you refuse me you’ll kill me; I shall not die of it. But I shall do worse; I shall live to no purpose.