One of the principal qualities of an enlightened being is humility. It would be out of character for buddhas to boast about their attainments and to egotistically gather disciples. By their genuine respect for all beings and their willingness to learn from everyone, great spiritual masters set a good example for us. We ordinary beings tend to show off our qualities and even brag about talents and achievements that we do not have. Advanced practitioners are the opposite: they remain humble.
Buddhism for Beginners by Thubten Chodron, page 25.