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.

We all need people who will give us feedback. That's how we improve.

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.

If you see that some aspect of your society is bad, and you want to improve it, there is only one way to do so: you have to improve people. And in order to improve people, you begin with only ONE thing: you can become better yourself.