Don't trust the person who has broken faith once.

All things that are, are with more spirit chased than enjoyed.

The coward dies a thousand deaths, the valiant, only once!

Beware of entrance to a quarrel, but, being in, bear t that th' opposed may beware of thee.

The devil shall have his bargain; for he was never yet a breaker of proverbs--he will give the devil his due.

In thee thy mother dies, our household's name, My death's revenge, thy youth, and England's fame.

I would challenge you to a battle of wits, but I see you are unarmed!