Old paint on canvas, as it ages, sometimes becomes transparent. When that happens it is possible, in some pictures, to see the original lines: a tree will show through a woman's dress, a child makes way for a dog, a large boat is no longer on an open sea. That is called pentimento because the painter 'repented,' changed his mind. Perhaps it would be as well to say that the old conception, replaced by a later choice, is a way of seeing and then seeing again.

科幻小说的力量在于它能让不可能的事情看起来可能。

In business, if you're not moving forward, you're falling behind.

"Every setback is a setup for a comeback."

Science is a journey, not a destination.

Success is not about being the best; it's about being better than you were yesterday.