Much learning does not teach understanding. Heraclitus
Of all men's miseries the bitterest is this: to know so much and to have control over nothing. Herodotus
If a man will begin with certainties, he will end in doubts; but if he will be content to begin with doubts, he will end in certainties. Francis Bacon
If a little knowledge is dangerous, where is the man who has so much as to be out of danger? Thomas H. Huxley
The only good is knowledge, and the only evil is ignorance. Diogenes Laertius
I'm not smart, but I like to observe. Millions saw the apple fall, but Newton was the one who asked why. Bernard Mannes Baruch
In expanding the field of knowledge we but increase the horizon of ignorance. Henry Miller
Insurrection of thought always precedes insurrection of arms. Wendell Phillips
The learning and knowledge that we have, is, at the most, but little compared with that of which we are ignorant. Plato
He that hath knowledge spareth his words. (Proverbs 17:27) Bible
Knowledge may give weight, but accomplishments give lustre, and many more people see than weigh Philip D. Stanhope
If thou would'st have that stream of hard-earn'd knowledge, of Wisdom heaven-born, remain sweet running waters, thou should'st not leave it to become a stagnant pond. H. P. Blavatsky