The aim of science is, on the one hand, a comprehension, as complete as possible, of the connection between the sense experiences in their totality, and, on the other hand, the accomplishment of this aim by the use of a minimum of primary concepts and relations.
科学的目标一方面是尽可能全面地理解感觉经验之间的联系，另一方面是通过使用最少的基本概念和关系来实现这一目标。
没有永恒的事实，就像没有绝对的真理一样。
办一件事都不能善始善终，就不要做很多事。
You can’t go back and change the beginning, but you can start where you are and change the ending.