If you have any doubt at all about being able to carry a load in one trip， do yourself a huge favor and make two trips.
No arts; no letters; no society; and which is worst of all, continual fear and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.
物理学家是一位探险家，他不满足于停留在已知世界的边界内。
如果你能够察觉我是了解你的那个人，那为什么我一直在这里，可是你却总是视而不见，你应该和我在一起。
The worth of a psychological theory is measured by its usefulness.