An old man who cannot bid farewell to life appears as feeble and sickly as the young man who is unable to embrace it.
Carl JungI use [Heraclitus' discovery of] enantiodromia for the emergence of the unconscious opposite in the course of time. This characteristic phenomenon practically always occurs when an extreme, onesided tendency dominates conscious life; in time an equally powerful counterposition is built up, which first inhibits the conscious performance and subsequently breaks through the conscious control.
Carl Jung