To take something with a pinch of salt.
One swallow doesn’t make a summer.
He who asks a question is fool for five minutes; He who does not ask remains a fool forever.
If you follow a fool, you’re a fool yourself.
A bad workman always blames his tools.
Facts are stubborn things.
A fool believes everything.
When the cat’s away the mice will play.
Never spend time with people who don’t respect you.
As you sow, so you reap.