Musar do Powtórzonego Prawa 28:20

This is like a tax imposed on the human race which one cannot escape from paying. Therefore, our sages, of blessed memory, said (Sifri 15:18): "I might think one can sit idle, but scripture says (Devarim 28:20): 'in all that you set your hand to do' ".

When we examine closely, we will find that Humility is dependent both on thought and deed. For at first, a person needs to become humble in his thoughts and only afterwards, can he conduct himself in the ways of the Humble.

Due to what he lacks: this is evident, for it is impossible for a man, whatever level of perfection he may have reached, to not have many deficiencies, whether due to his nature, or due to his family and relatives, due to certain events that happened to him, or due to his own deeds. For "there is no righteous man on earth who does good and sins not" (Kohelet 7:20). All these are blemishes on a person which allow him no room whatsoever to become haughty. Even if he has attained many virtues, nevertheless these deficiencies are enough to obscure them.