Mental activity is always directed toward some end.
心理活动总是朝向某个目的。
保持好奇心是创新的源泉。
"Memory is a strange thing, it doesn't work like I thought it did. We are so used to thinking of it as a camera or a tape recorder, but it's not like that at all. It's more like a painter, who adds and subtracts elements according to his own rules."
成功的最好方法是永不放弃。