This fear of criticism displayed by the advocates of freedom of criticism cannot be attributed solely to craftiness. No, the majority of the Economists look with sincere resentment upon all theoretical controversies, factional disagreements, broad political questions, plans for organising revolutionaries, etc.

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

If you look for perfection, you'll never be content.

Criticism is easy; achievement is difficult.

One of the sure signs of maturity is the ability to rise to the point of self criticism.

Criticism may not be agreeable but it is necessary. It fulfils the same function as pain in the human body. It calls attention to an unhealthy state of things.