Golda Meir once said, "Don’t be so humble; you’re not that great." Humility is a quality we love to see in others, and we try to feign in ourselves, but I'm not sure what passes as humility is actually humility.
Why is it that you see the speck in the eye of your brother, but the log that is in your eye, you do not notice? How can you tell your brother, “Permit me, and I will remove the speck from your eye,” and hinneh, the log is in your eye? Hypocrite, remove first the log from your eye, and afterward, you will surely see to remove the speck from the eye of your brother. --Matthew 7:3-5, DHE
For thus we find in the case of Cain, who killed his brother, that it is written: the bloods of your brother cry unto me: not the blood of your brother, but the bloods of your brother, is said i.e., his blood and the blood of his [potential] descendants. (Alternatively, the blood of your brother, teaches that his blood was splashed over trees and stones.) For this reason was man created alone, to teach you that whosoever destroys a single soul of Israel, scripture imputes [guilt] to him as though he had destroyed a complete world; and whosoever preserves a single soul of Israel, scripture ascribes [merit] to him as though he had preserved a complete world. --Talmud, Sanhedrin 37a
The Hebrew word for humility is anavah. Anavah denotes balance; a moderate, accurate understanding of ourselves.
When we have conceit, we fill a room with our enormous presence when we enter. There is no room for anyone else, there is no space for anyone to flourish.
The Baal Shem Tov once traveled with a group of his disciples to a distant village where there lived a certain parush (ascetic) who was constantly engaged in Torah study, prayer, and other divine service, to the exclusion of everything else. He was totally indifferent to worldly affairs. Whenever he uttered any words of Torah, he added, "So I received it from Elijah the Prophet." He was also an exceptional teacher who possessed a remarkable ability to clarify a complex Torah topic for anyone to whom he spoke, even the simplest person. Who could be more exalted?