“According to the AriZal, the ayin is a vav contained in a nun.
The nun represents humility. The vav signifies Torah, which descends from Heaven to earth in its inherent design of a hook or a chute.
Vav also has the gematria of six. This represents the Six Orders of the Mishnah, the Oral Law.
Only an individual who is unassuming, who has the humility of the nun, is fit to acquire the higher level of the vav, the ‘crown of Torah.'”