know thyself

One is best served by studying and understanding one's own physical and psychological strengths, weaknesses, limitations, and influences. Look, I know you get wrapped up in what other people think and do, but you should focus on knowing thyself first and foremost. Only you can decide whether you have what it takes to keep on trying. Know thyself.

physician, heal thyself

proverb Do not rebuke or correct someone else for the very faults or problems of which you yourself are guilty. A: "You coddle Tommy way too much—you need to be stricter with him!" B: "Me? You give in to every demand he makes. Sheesh—physician, heal thyself!"

Know thyself.

Prov. Be aware of your own limitations; know what you are capable of doing. (This was the motto inscribed on the temple of Apollo at Delphi.) The motto of the ballet corps was "Know thyself"; every dancer was expected to know how far she could stretch, and not hurt herself by trying to exceed her limits. "Know thyself," the high school guidance counselor admonished us, "and try to find a career that makes the most of your abilities."

Physician, heal thyself.

Prov. Do not rebuke someone for a fault or problem you have yourself. (Biblical.) Ellen: You're such a spendthrift. You should go on a strict budget. Fred: But you manage money even worse than I do! Physician, heal thyself. Jane: You look like you're gaining weight. You should probably get more exercise. Alan: Physician, heal thyself. You're getting a little pudgy, too.

physician, heal thyself

before attempting to correct others, make sure that you aren't guilty of the same faults yourself. proverb

This expression alludes to Luke 4:23: ‘And he said unto them, Ye will surely say unto me this proverb, Physician, heal thyself: whatsoever we have heard done in Capernaum, do also here in thy country’.