Manager solves problems, leader prevents them.

External conditions can, to a certain extent, reduce, but never cancel individual repsonsibility.

Long hair minimizes the need for barbers; socks can be done without; one leather jacket solves the coat problem for many years; suspenders are superfluous.

God is a scientist, not a magician.

I wish to do something Great and Wonderful, but I must start by doing the little things like they were Great and Wonderful

[Freud's] sense of reality is less clouded by wishful thinking than is the case with other people and [he combines] the qualities of critical judgment, earnestness and responsibility.

Nothing truly valuable can be achieved except by the unselfish cooperation of many individuals.