If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it; and this you have the power to revoke at any moment.
— Marcus Aurelius

Think highly of yourself, for the world takes you at your own estimate.
Unknown estimates quote

Humility is to make a right estimate of one's self.
— Charles Spurgeon

Good luck is a lazy man's estimate of a worker's success.
— Unknown

The test of civilization is its estimate of women.
— George William Curtis