In Paradise there are many saints who never gave alms on earth: their poverty justified them. There are many saints who never mortified their bodies by fasting or wearing hair-shirts: their bodily infirmities excused them. There are many saints, too, who were not virgins: their vocation was otherwise.
But in Paradise there is no saint who was not humble. God banished angels from heaven for their pride; therefore how can we pretend to enter therein if we do not keep ourselves in a state of humility? To be humble is to be truthful before God, for what is humility but a recognition of ourselves as totally dependent on Him? Saint Vincent de Paul said: "The reason God is such a great lover of humility is that He is a great lover of truth. Humility is, in fact, truth, while pride is nothing but lying."
From Humility of Heart by Father Cajetan