Lineage and Pride

Korach, the son of Yitzhar, the son of Kehot, the son of Levi, separated himself, with Datan and Aviram, sons of Eliav, and On son of Pelet, the offspring of Reuben (16:1) A distinguished lineage is meaningful only when it brings a person to feel humbled in the face of his illustrious ancestors. Unfortunately, however, it sometimes has the opposite effect, resulting in baseless pride and arrogance. Korach is a prime example of the latter; too much self-esteem allowed him to rebel against Moses. (Lechayim - Rabbi Naftali of Ropshitz)