Your worst enemy lives inside your own chest.

What it means

Outside opponents are rarely the real problem. The hardest one to face is the other self inside you: the part that wants what you will not admit. Knowing it is there is the start of beating it.

The source

"Your worst enemy lives inside your own chest." Carl Jung said it in Two Essays (1928), I, ch. III 'The Other Point of View: The Will to Power'. Translated by H. G. and C. F. Baynes, 1928.

"A true man, however, knows that his most bitter foe, or indeed a whole host of enemies, does not equal that one worst adversary, that 'other self,' who 'bides within his breast.'"

H. G. and C. F. Baynes, 1928, Two Essays (1928), I, ch. III 'The Other Point of View: The Will to Power'. Text read at archive.org.

Who said it

Carl Jung (1875–1961). Swiss psychiatrist who broke with Freud and founded analytical psychology. He mapped the persona, the shadow, the collective unconscious and the lifelong work of becoming yourself, which he called individuation. Our lines come only from his writings published before 1931, in our own translations from the German or in English translations of the time.

Questions

What does "Your worst enemy lives inside your own chest." mean?

Outside opponents are rarely the real problem. The hardest one to face is the other self inside you: the part that wants what you will not admit. Knowing it is there is the start of beating it.

Who said "Your worst enemy lives inside your own chest."?

Carl Jung (1875–1961). Source: Two Essays (1928), I, ch. III 'The Other Point of View: The Will to Power'.

What is the original wording?

A true man, however, knows that his most bitter foe, or indeed a whole host of enemies, does not equal that one worst adversary, that 'other self,' who 'bides within his breast.' (H. G. and C. F. Baynes, 1928). Translated by H. G. and C. F. Baynes, 1928.

Is "Your worst enemy lives inside your own chest." on a shirt?

Yes. We print it to order on our tees in 7 illustrated looks, from $44, with free US shipping.

"Your worst enemy lives inside your own chest." (Carl Jung, Two Essays (1928), I, ch. III 'The Other Point of View: The Will to Power', trans. H. G. and C. F. Baynes, 1928). https://spartansurfers.com/quotes/your-worst-enemy-lives-inside-your-own-chest