Don't let your mind wander; it's far too little to be let out on its own.
He has depth, but only on the surface. Deep down inside, he is shallow.
I know you're nobody's fool, but maybe someone will adopt you one day.
If what you don't know can't hurt you, she's practically invulnerable.
The boss is not himself today. I noticed the improvement immediately.
People would follow him anywhere -- but only out of morbid curiosity.
Are you always this stupid, or are you making a special effort today?
He always finds himself lost in thought -- an unfamiliar territory.
Do you have to leave so soon? I've just poisoned some tea for you?
She has reached rock-bottom and shows signs of starting to dig.