There are two kinds of truths: small truth and great truth. You can recognize a
small truth because its opposite is a falsehood. The opposite of a great truth is
another great truth. - Aage Niels Bohr
存在着两类真理:细小的真理和伟大的真理。你能够认出细小的真理,因为与它相对的就是错误。与伟大的真理相对的则是另一个伟大的真理。 -A·N·波尔( 1922- ,丹麦物理学家)