The only limit to our realization of tomorrow is our doubts of today.

In the realm of psychology, the power of suggestion can alter perceptions and even memories, highlighting the malleability of the human mind.

When you live for others' opinions, you are dead.

译文：专门注重修养内心的人每天都会看到自己的不足，专门注重增长见识的人每天都会看到自己的长处。每天看到自己不足的人会逐渐变得有长处，每天看到自己有长处的人会逐渐变得有不足。