You don't need an explanation for everything, Recognize that there are such things as miracles -- events for which there are no ready explanations. Later knowledge may explain those events quite easily.
-- Harry Browne
The consuming desire of most human beings is deliberately to plant their whole life in the hands of some other person. I would describe this method of searching for happiness as immature. Development of character consists solely in moving toward self-sufficiency.
-- Quentin Crisp
Whoever acquires knowledge but does not practice it, is as one who plows but does not sow.
Whatever the mind of man can conceive and believe, it can achieve.