D'var Torah: Korah accused Moshe of favoritism because Moshe appointed his own brother, Aaron to be the High Priest. Korach gathered a few hundred prominent people and lead a futile rebellion against Moshe. Korah felt he was standing up for truth and justice. However, his real motivation was jealousy. He felt slighted because Moshe appointed one of Korach's younger relatives. It is important to point out that Korach was a wise and righteous man. The jealousy that drove him was subconscious and he did not detect it, whatsoever. Yet, if Korach didn't realize that jealousy stirred his actions, why is he culpable? Korach was responsible to introspect and recognize the latent jealousy that moved him to fight against Moshe.
Moral: We can overcome the influence of inner feelings by being aware that they have the power to influence our behavior. This realization inspires us to look deeply within ourselves to make sure that our motivations our pure. We can keep our feelings in check by fully devoting our hearts to HaShem, as King Solomon said,. "My son, give Me your heart."
Application: Envision Korach contending with Moshe and ultimately being disgraced. Note how subconscious feelings caused his downfall. Make an inner resolve to dedicate you heart wholly to HaShem. You will be protected from making costly mistakes and blessed with success, peace of mind, and inner joy.
(Based on the commentary of the Saba Kadisha M'Kelm)