Enjoyment appears at the boundary between boredom and anxiety, when the challenges are just balanced with the person’s capacity to act.
The past is not a burden but a foundation upon which we build our future.
Innovation in science often comes from looking at old problems in new ways.
我饭吃但是如果不吃,对于饥饿是没有益处的。见到了贤能的人们而不去任用,这样对于衰弱的国家,也是没有益处的。