"We love even when our love is not requited."

"Ultimately, we wish the joy of perfect union with the person we love."

"Think how different human societies would be if they were based on love rather than justice. But no such societies have ever existed on earth."

"The ultimate end of education is happiness or a good human life, a life enriched by the possession of every kind of good, by the enjoyment of every type of satisfaction."

"Theories of love are found in the works of scientists, philosophers, and theologians."

"If one wants another only for some self-satisfaction, usually in the form of sensual pleasure, that wrong desire takes the form of lust rather than love."

"Men value things in three ways: as useful, as pleasant or sources of pleasure, and as excellent, or as intrinsically admirable or honorable."

"The telephone book is full of facts, but it doesn't contain a single idea."

"I wonder if most people ever ask themselves why love is connected with reproduction. And if they do ask themselves about this, I wonder what answer they give."

"Conjugal love, or the friendship of spouses, can persist even after sexual desires have weakened, withered, and disappeared."

"Unless we love and are loved, each of us is alone, each of us is deeply lonely."

"Ask others about themselves, at the same time, be on guard not to talk too much about yourself."

"One of the aims of sexual union is procreation - the creation by reproduction of an image of itself, of the union."

"Love wishes to perpetuate itself. Love wishes for immortality."

"When we ask for love, we don't ask others to be fair to us-but rather to care for us, to be considerate of us. There is a world of difference here between demanding justice... and begging or pleading for love."

"Freedom is the emancipation from the arbitrary rule of other men."

"We acknowledge but one motive - to follow the truth as we know it, whithersoever it may lead us; but in our heart of hearts we are well assured that the truth which has made us free, will in the end make us glad also."

"In English we must use adjectives to distinguish the different kinds of love for which the ancients had distinct names."

"You have to allow a certain amount of time in which you are doing nothing in order to have things occur to you, to let your mind think."

"It is love rather than sexual lust or unbridled sexuality if, in addition to the need or want involved, there is also some impulse to give pleasure to the persons thus loved and not merely to use them for our own selfish pleasure."

"In the case of good books, the point is not to see how many of them you can get through, but how many can get through to you."

"Love without conversation is impossible."

"Not to engage in the pursuit of ideas is to live like ants instead of like men."

"Erotic or sexual love can truly be love if it is not selfishly sexual or lustful."

"Love can be unselfish, in the sense of being benevolent and generous, without being selfless."

"If you never ask yourself any questions about the meaning of a passage, you cannot expect the book to give you any insight you do not already possess."

"The philosopher ought never to try to avoid the duty of making up his mind."

"Love consists in giving without getting in return; in giving what is not owed, what is not due the other. That's why true love is never based, as associations for utility or pleasure are, on a fair exchange."

"I find the selectivity of erotic love - the choice of this man or this woman - much more intelligible if liking the person is the origin of sexual interest, rather than the other way."

"Freud's view is that all love is sexual in its origin or its basis. Even those loves which do not appear to be sexual or erotic have a sexual root or core. They are all sublimations of the sexual instinct."

"The love which moves the world, according to common Christian belief, is God's love and the love of God."

"Friendship is a very taxing and arduous form of leisure activity."

"The purpose of learning is growth, and our minds, unlike our bodies, can continue growing as we continue to live."

"One of the embarrassing problems for the early nineteenth-century champions of the Christian faith was that not one of the first six Presidents of the United States was an orthodox Christian."

"Aristotle uses a mother's love for her child as the prime example of love or friendship."

"There is only one situation I can think of in which men and women make an effort to read better than they usually do. It is when they are in love and reading a love letter."