Sometimes, I think the reason we hold onto something so tight is because we fear something so great will never happen again.

Variant: All human actions have one or more of these seven causes: chance, nature, compulsions, habit, reason, passion and desire.

哲学史不像科学史那样，仅仅被视为发现和错误的年代记录。它是人类精神在努力理解自身及其与宇宙关系的历史。