"Wisdom too often never comes, and so one ought not to reject it merely because it comes late." -- Felix Frankfurter 

"To make no mistakes is not in the power of man; but from their errors and mistakes the wise and good learn wisdom for the future." –- Plutarch  

"True wisdom is less presuming than folly.  The wise man doubteth often, and changeth his mind; the fool is obstinate, and doubteth not; he knoweth all things but his own ignorance." -- Akhenaton

"To act and act wisely when the time for action comes, to wait and wait patiently when it is time for repose, put man in accord with the rising and falling tides (of affairs), so that with nature and law at his back, and truth and beneficence as his beacon light, he may accomplish wonders. Ignorance of this law results in periods of unreasoning enthusiasm on the one hand, and depression on the other. Man thus becomes the victim of the tides when he should be their master." -- Helena Petrova Blavatsky  

"Wisdom consists not so much in knowing what to do in the ultimate as in knowing what to do next." -– Herbert Hoover

"The most important thing I have learned over the years is the difference between taking one's work seriously and taking one's self seriously. The first is imperative, and the second disastrous." -- Margaret Fontey  

"A person dies daily, only to be reborn in the morning, bigger, better, wiser." -- Emmet Fox  

"Wisdom is the lesson learned, applied." -– Rick Beneteau  

"Wise men talk because they have something to say; fools, because they have to say something." -- Plato