More quotes by Jostein Gaarder, Sophie's World

"If you believed in Christianity or Islam it was called 'faith', but if you believed in astrology or friday the thirteenth it was Superstition!"
"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'."
"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."
"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."
"It's not him who's disturbed. But he likes to disturb others--to shake them out of their rut."