He only moves toward the perfection of his art whose criticism surpasses his achievement.

Sometimes, you can learn more from criticism than you can from flattery.

The easiest and noblest way is not to be crushing others, but to be improving yourselves.

I love those who do not know how to live except as down-goers, for they are the over-goers.

The goal is not to be better than the other man, but your previous self.

People involve themselves in countless activities which they consider to be important, but they forget about one activity which is more important and necessary than any other, and which includes all other things: the improvement of their soul.