You always become the thing you fight the most.

No man can change himself into anything from sheer reason; he can only change into what he potentially is.

Life is teleology par excellence; it is the intrinsic striving towards a goal, and the living organism is a system of directed aims which seek to fulfill themselves.

In every adult there lurks a child— an eternal child, something that is always becoming, is never completed, and calls for unceasing care, attention, and education. That is the part of the personality which wants to develop and become whole.

Nothing has a stronger influence psychologically on their environment and especially on their children than the unlived life of the parent.

Not nature, but the "genius of mankind," has knotted the hangman's noose with which it can execute itself at any moment.

Man needs difficulties; they are necessary for health.