He that knows himself best, esteems himself least.

The proverb links self-knowledge with humility. Someone who sees their own shortcomings clearly is less inclined to feel superior to others.

It presents modesty as a consequence of honest self-examination, rather than as a denial of one’s abilities or worth.

Use it when discussing how awareness of personal faults can temper pride, especially when someone seems too certain of their own excellence. Its older phrasing suits reflective or literary prose better than casual conversation.