"The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes"

"Knowledge of what is possible is the beginning of happiness"

"The seat of knowledge is in the head, of wisdom, in the heart"

"What we want is to see the child in pursuit of knowledge, and not knowledge in pursuit of the child"

"Never stop learning; knowledge doubles every fourteen months"

"Knowledge is knowing that we cannot know"

"Where knowledge ends, religion begins"

"The more extensive a man's knowledge of what has been done, the greater will be his power of knowing what to do"

"Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind"

"Knowledge like timber shouldn't be mush use till they are seasoned"

"To know, is to know that you know nothing. That is the meaning of true knowledge"