实际发展水平与潜在发展水平之间的距离，前者由独立解决问题决定，后者由在成人指导下或与更有能力的同伴合作解决问题决定。
译文：一起观察世人所崇尚的，悠闲地选择美好的时光。
我不需要理由去自信。
Find more pleasure in intelligent dissent than in passive agreement, for, if you value intelligence as you should, the former implies a deeper agreement than the latter.
真正的学者不在于知道多少，而在于热爱真理。
故事的力量在于它能够激发创造力。
Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.
I don't know if I'm the best or not, but I always try to be better.