The Mystical City of God by Venerable Mary of Agreda, at page 548, gives a summary to the importance of working for greater virtue. In the section of Words of The Queen, Blessed Mary relates to Ven. Mary of Agreda as follows: I desire that the fruit of the obedience with which thou writes the history of my life shall be, that thou become a true disciple of my most holy Son and of myself. The main purpose of the exalted and venerable mysteries, which are made known to thee, and of the teachings, which I so often repeat to thee, is that thou deny and strip thyself, estranging thy heart from all affection to creatures, neither wishing to possess them nor accept them for other uses. By this precaution thou wilt overcome the impediments, which the devils seek to place in the way of the dangerous softness of thy nature. I who know thee, thus advise and lead thee by the way of instruction and correction as thy Mother and Instructress. By the divine teaching thou knows the mysteries of the Passion and Death of Christ and the one true way of life, which is the Cross; and thou knows that not all who are called, are chosen. Many there are who wish to follow Christ and very few who truly dispose themselves to imitate Him; for as soon as they feel the sufferings of the Cross they cast it aside. Laborious exertions are very painful and averse to human nature according to the flesh; and the fruits of the spirit are more hidden and few guide themselves by the light. On this account there are so many among mortals, who, forgetful of the eternal truths, seek the flesh and the continual indulgence of its pleasures. They ardently seek honors and fly from injuries: they strive after riches, and condemn poverty; they long after pleasure and dread mortification. All these are enemies of the Cross of Christ (Phil. 3, 18), and with dreadful aversion they fly from it, deeming it sheer ignominy, just like those who crucified Christ, the Lord.