Sleep not when others speak, sit not when others stand, speak not when you should hold your peace, walk not when others stop.

Look not to the faults of others, nor to their omissions and commissions. But rather look to your own acts, to what you have done and left undone.

I look only to the good qualities of men. Not being faultless myself, I won't presume to probe into the faults of others.

You speak an infinite deal of nothing.

There is poison in the fang of the serpent, in the mouth of the fly and in the sting of a scorpion; but the wicked man is saturated with it.

Do not put your trust in a bad companion nor even trust an ordinary friend, for if he should get angry with you, he may bring all your secrets to light.