ты сам себя

you yourself

→ ты
phrase Rare #36,787
you yourself An emphatic form meaning that you are doing something to yourself. The form сам is used with ты when addressing a male; сама is used when addressing a female. The phrase is followed by a verb, such as не узнаёшь (don't recognize), ненавидишь (hate), or обманываешь (deceive).
RU: Ты сам себя недооцениваешь.
EN: You yourself underestimate yourself.

Ты сам себя обманываешь.

You are deceiving yourself.

Ты сам себя не узнаешь.

You won’t recognize yourself.