“ Educators take something simple and make it complicated. Communicators take something complicated and make it simple. 教育者把简单的东西变得复杂。沟通者把复杂的事情简单化。 John C. Maxwell 约翰.麦斯威尔
“ We live on an island surrounded by a sea of ignorance. As our island of knowledge grows, so does the shore of our ignorance. 我们生活在一个被无知之海包围的岛上。知识之岛越长,无知之岸也越长。 John Archibald Wheeler 约翰·阿奇博尔德·惠勒
“ The meaning of a proposition is the method of its verification. 命题的意义是其验证的方法。 Moritz Schlick 莫里茨·石里克