knock some sense into

abound in one's own sense

To follow one’s own inclinations and opinions.

don't knock yourself out

Don't overexert yourself (in doing something that does not require much effort).

good sense

Common sense; sensibleness.

knock down a peg

Synonym of take down a notch.

knock for a loop

To astonish; to stagger or overwhelm; to confuse or disorient.

knock it off

to tell someone to stop doing something annoying or wrong.

knock on heaven's door

To die or be close to death.

knock on wood

To take a customary action to ward off some misfortune that is believed to be attracted by a presumptuous statement.