“ If there are no isolated phenomena in the world, if all phenomena are interconnected and interdependent, then it is clear that every social system and every social movement in history must be evaluated not from the standpoint of "eternal justice" or some other preconceived idea, as is not infrequently done by historians, but from the standpoint of the conditions which gave rise to that system or that social movement and with which they are connected. ”

“ It is not heroes that make history, but history that makes heroes. ”

“ The price of greatness is responsibility. ”

“ The greatest lesson in life is to know that even fools are right sometimes. ”

“ Man is by nature a social animal; an individual who is unsocial naturally and not accidentally is either beneath our notice or more than human. Society is something that precedes the individual. Anyone who either cannot lead the common life or is so self-sufficient as not to need to, and therefore does not partake of society, is either a beast or a god. ”

“ Those who educate children well are more to be honored than they who produce them; for these only gave them life, those the art of living well. ”

“ Wishing to be friends is quick work, but friendship is a slow ripening fruit. ”

“ It is not the failure of others to appreciate your abilities that should trouble you, but rather your failure to appreciate theirs. ”

“ Respect yourself and others will respect you. ”

“ He who knows all the answers has not been asked all the questions. ”

“ If he [Thomas Edison] had a needle to find in a haystack, he would not stop to reason where it was most likely to be, but would proceed at once with the feverish diligence of a bee, to examine straw after straw until he found the object of his search. … Just a little theory and calculation would have saved him ninety percent of his labor. ”

“ I realize I'm black, but id like to be viewed as a person, and that is everybody's wish. ”