Jostein Gaarder, Sophie's World

"A true philosopher must never give up."

"Only philosophers embark on this perilous expedition to the outermost reaches of language and existence. Some of them fall off, but others cling on desperately and yell at the people nestling deep in the snug softness, stuffing themselves with delicious food and drink. 'Ladies and Gentlemen,' they yell, 'we are floating in space!' But none of the people down there care"

"The rearing of children is considered too important to be left to the individual and should be the responsibility of the state."

"A composition—and every work of art is one—is created in a wondrous interplay between imagination and reason, or between mind and reflection. For there will always be an element of chance in the creative process."

"Health is the natural condition. When sickness occurs, it is a sign that Nature has gone off course because of a physical or mental imbalance. The road to health for everyone is through moderation, harmony, and a 'sound mind in a sound body'."

"ويبدوا أنه مع العمر لا يطل هناك ما يدهشان . لكننا بذلك نفقد شيئا أساسيا هو ما يحاول الفلاسفة إيقاظه فيه داخلنا. ذاك ‘ن صوتا في عمق أعماقنا يقول لنا ان الحياة لغز كبير. وهذا ما جربناه قبل أن يعلموننا اياه بكثير"

"But understanding will always require some effort. You probably wouldn't admire a friend who was good at everything if it cost her no effort."

"If you believed in Christianity or Islam it was called 'faith', but if you believed in astrology or friday the thirteenth it was Superstition!"

"Wisest is she who knows she does not know."

"A hydrogen atom in a cell at the end of my nose was once part of an elephant's trunk. A carbon atom in my cardiac muscle was once in the tail of a dinosaur."

"When we sense something, it is due to the movement of atoms in space. When I see the moon it is because "moon atoms"penetrate my eye."

"And although I have seen nothing but black crows in my life, it doesn't mean that there's no such thing as a white crow. Both for a philosopher and for a scientist it can be important not to reject the possibility of finding a white crow. You might almost say that hunting for 'the white crow' is science's principal task."

"It's not him who's disturbed. But he likes to disturb others--to shake them out of their rut."

"He could very likely have appealed for leniency. At least he could have saved his life by agreeing to leave Athens. But had he done this he would not have been Socrates. He valued his conscience--and the truth-- higher than life."

"A philosopher knows that in reality he knows very little. That is why he constantly strives to achieve true insight. Socrates was one of these rare people. He knew that he knew nothing about life and about the world. And now comes the important part: it troubled him that he knew so little."

"A state that does not educate and train women is like a man who only trains his right arm."

"A lot of people experience the world with the same incredulity as when a magician pulls a rabbit out of a hat.…We know that the world is not all sleight of hand and deception because we are in it, we are part of it. Actually we are the white rabbit being pulled out of the hat. The only difference beween us and the white rabbit is that the rabbit does not realize it is taking part in a magic trick."

"People are, generally speaking, either dead certain or totally indifferent (Both types are crawling around deep down in the rabbit's fur!)"

"Man is the measure of all things', said the Sophist Protagora (c. 485-410 B.C.). By that he meant that the question of whether a thing is right or wrong, good or bad, must always be considered in relation to a person's needs."

"Life is both sad and solemn. We are led into a wonderful world, we meet one another here, greet each other - and wander together for a brief moment. Then we lose each other and disappear as suddenly and unreasonably as we arrived."