The reading is taken from the Epistle to the Hebrews 4:1-11.
The Divine Apostle states that the promise made to the Jewish people remains and that we who are Christians, are being called to the land that was announced to the Blessed Patriarchs. The institution of the New Covenant made effective by the most precious blood of the Lamb was not brought about simply by God in haste after His previous attempts to convert man to Him had proven unsuccessful. From all eternity, the Heavenly Father had preordained His ineffable plan for the creation and subsequent redemption of man, to glorify His Sacred Name and unite the human race in grace to the divine trinitarian life.
Throughout time, seeds of truth were sown in the field of the world to predispose man to embrace with his whole being the Word Himself come down from heaven. This seed-bearing Word (logos spermatikos) led man to come to divine truth in a gradual manner whereby the human intellect would have the capacity to accept. Yet, if our heart's are hardened, the generous mercy of God will prove futile in relation to our souls, which will whither under a curse and be thrown outside among the weeping and gnashing of teeth. Let not earthly cares arise in our souls, corruptible treasure is no riches at all!
It is a law of this world that no man can enter into rest unless he has toiled or overcome something. Even though man is unworthy of such a blessed inheritance, he must work through love founded upon faith, to manifest wilfully man's natural desire to possess the Good. He must cast off disordered love for apparent goods to attain to the Summum Bonum.
If one returns to the Old Testament, the reason that a particular generation of Jews in the desert did not set foot on that blessed soil was that they refused to trust. They rallied against Moses, the Servant of the Lord, thereby disparaging the goodness of their Creator who had brought them out from the land of sin by the hand of Moses. 'Why O Moses, have you brought us to rot in the desert? Yes, we were slaves in a foreign land, yet we knew what to expect. We were fed, watered, clothed. But, we now suffer in misery, confounded in a land of no direction.'
They refused to work, to toil in darkness, to trust fully in the goodness of God, even though all appeared hopeless. Without hope, man is suffocated by the cares, exertions and tribulations of the current ages, but with faith, that is seeing with the mind of God, all is bearable and can not endured with patience.
Man will often sacrifice for peace in this world, yet what will we cast off in order to inherit the kingdom of the saints in light? Will we run this race, under the mantle of the Blessed Mother, or will be lost through disobedience?
For us Catholic Christians, who have been so greatly blessed, a worse condemnation is laid up for us if we neglect the graces to bring us to life.