(idiomatic) To experience the consequences of one's actions.

If you eat well, you will be well; however, if you eat badly, you will feel bad.

Alternative form of what the doctor ordered

(intransitive, idiomatic) To receive as a return or reward in the same measure as one's exertions or intentions, in a good or a bad sense; to receive justice or one's just deserts.

(Internet slang) Used to indicate that something has left one in a state of disbelief or confusion.

(British spelling) Alternative form of practice what one preaches

(informal) To understand one's situation, how to act in that situation, and the results of those actions.

A request for clarification of an anterior statement or question. / An expression of surprise, annoyance, or disagreement to an anterior statement.

(archaic) An expression of wonder and marvel at something.

Who one falls in love with is not a rational or deliberate decision.