Old hardcover books in many colors stacked on a surface in the foreground. There is a hole formed by the stacks, and through it we see an out of focus library with more books.

Book Quotes

Books help us travel and meet new people without leaving home, find ourselves, learn new skills or knowledge, and much, much more. The right book at the right time can…

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Science Quotes

Science, as both a body of knowledge and a practice, is about understanding the world in which we live through curious investigation and through testing of our theories by observation…

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Opinion Quotes

An opinion is a conclusion or judgment, a belief. Opinions may or may not be based on facts and knowledge, but are based on experience and on limited factual knowledge, and are often flavored by emotion or group beliefs. Opinions are not certainty, though some who express opinions seem to think they are.

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Doubt and Uncertainty Quotes

Doubt is the feeling of uncertainty about something, calling into question whether something is true or possible. Uncertainty is a feeling or status where something is not known, and can…

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Imagination Quotes

The human ability to imagine that which is not yet in existence is a source of creativity and reverence. Imagination may be more important than knowledge, and it is an…