The virtue that is required for oneself is the diametric opposite of that which one is required to exercise in relation to others. This is particularly true concerning humility, which is the sublimest of all traits.
A person is required to exercise it to the utmost degree. On the other hand, one should not treat one’s fellow with this trait and degrade his status in the name of humility. ~ R’ Yisroel Salanter zt”l