Many cogent Catholic lines of thought, taken towards their logical conclusion end in “…it’s a mystery.” Granted, somewhat unsatisfying, but accurate. When the Church, or a well formed member of hers, uses the “mystery”, their meaning in using this word is 180 degrees inverted from our common usage of this word. The Catholic definition of the word “mystery” is: not something which cannot be known, but, rather, something which can be infinitely known.
“It is tempting for the contemporary Catholic, especially an enthusiastic apologist, to try to explain and to prove the faith to others. I know many, myself included, who have discussed the faith with family or friends who have fallen away or even simply have a question to ask: nearly always, I overdid it. We want to recommend a great book to them, answer their questions, or take away all their intellectual obstacles to belief. After all, if everyone knew how reasonable our faith is, they would stop fighting it and hop on board, right? St. Thomas Aquinas cautions us against this method, “lest anyone, presuming to demonstrate what is of faith, should bring forward reasons that are not cogent, so as to give occasion to unbelievers to laugh” (Summa Theologiae). This is not merely a cautionary measure for those who simply do not know the reasons, as if he is telling us to leave the arguments to the experts. Rather, St. Thomas wants to safeguard the divine origin of faith, “that your faith might not rest in the wisdom of men but in the power of God” (1 Cor 2:5).
Following this, the First Vatican Council declared, “There is a twofold order of knowledge, distinct both in principle and in object” (Dei Filius, Ch. 4). On the one hand, there is natural knowledge, which progresses from human reason as its principle and reaches toward its appropriate truths (those which we can discover through experience, argumentation, etc.). The other order is supernatural, bestowed on us through the divine gift of faith, revealing to us truths beyond our natural capacity. Indeed, Dei Filius insists that “there are proposed to our belief mysteries hidden in God, which unless divinely revealed cannot be known.” Furthermore, the supernatural order can grant us certitude even about some truths within the realm of reason.
The First Vatican Council and St. Thomas want us to recognize the distinct spheres of faith and reason, while realizing that the subject matter does indeed overlap at times. For example, we can know that God exists by reason and by faith. Natural reason can arrive through argumentation concerning the origin, conservation, and governance of creation to the certainty of the existence of God (with much difficulty, the admixture of error, and only after a long time, St. Thomas tells us). Reason is confident because of the soundness of one’s argument and understanding. Through faith, on the other hand, we believe in God because God revealed himself to us. Faith’s confidence rests in God, trusting not in our own ability but in God’s testimony.
While faith can certainly overlap in content with reason, we should remember what Vatican I told us: “There are proposed to our belief mysteries hidden in God, which unless divinely revealed cannot be known.” Far beyond reason’s reach, faith receives mystery. We should not depreciate these mysteries, as if we can penetrate them without divine assistance. After all, these mysteries are hidden in God! Far from discouraging us from seeking to understand, the recognition of the hidden, inaccessible character of mystery should teach us how precious faith is. Even if only “in a mirror dimly” (1 Cor 13:12), faith enables us to see these hidden mysteries. Let us dwell in these mysteries through faith, awaiting the day we may see the Lord face-to-face forever.”
Love, living with you the mystery,
Matthew
Summa Catechetica, "Neque enim quaero intelligere ut credam, sed credo ut intelligam." – St Anselm, "“Si comprehendus, non est Deus.” -St Augustine, "Let your religion be less of a theory, and more of a love affair." -G.K. Chesterton, “When we pray we speak to God; but when we read, God speaks to us.” -St Jerome, "As the reading of bad books fills the mind with worldly and poisonous sentiments; so, on the other hand, the reading of pious works fills the soul with holy thoughts and good desires." -St. Alphonsus Liguori, "And above all, be on your guard not to want to get anything done by force, because God has given free will to everyone and wants to force no one, but only proposes, invites and counsels." –St. Angela Merici, “Yet such are the pity and compassion of this Lord of ours, so desirous is He that we should seek Him and enjoy His company, that in one way or another He never ceases calling us to Him . . . God here speaks to souls through words uttered by pious people, by sermons or good books, and in many other such ways.” —St. Teresa of Avila, "I want a laity, not arrogant, not rash in speech, not disputatious, but men and women who know their religion, who enter into it, who know just where they stand, who know what they hold and what they do not, and who know their creed so well that they can give an account of it, who know so much of history that they can defend it. I want an intelligent, well-instructed laity… I wish you to enlarge your knowledge, to cultivate your reason, to get an insight into the relation of truth to truth, to learn to view things as they are, to understand how faith and reason stand to each other, what are the bases and principles of Catholicism, and where lie the main inconsistences and absurdities of the Protestant theory.” (St. John Henry Newman, “Duties of Catholics Towards the Protestant View,” Lectures on the Present Position of Catholics in England), "We cannot always have access to a spiritual Father for counsel in our actions and in our doubts, but reading will abundantly supply his place by giving us directions to escape the illusions of the devil and of our own self-love, and at the same time to submit to the divine will.” —St. Alphonsus Ligouri, "The harm that comes to souls from the lack of reading holy books makes me shudder . . . What power spiritual reading has to lead to a change of course, and to make even worldly people enter into the way of perfection." –St. Padre Pio, "Screens may grab our attention, but books change our lives!" – Word on Fire, "Reading has made many saints!" -St Josemaría Escrivá, "Do you pray? You speak to the Bridegroom. Do you read? He speaks to you." —St. Jerome, from his Letter 22 to Eustochium, "Encounter, not confrontation; attraction, not promotion; dialogue, not debate." -cf Pope Francis, "God here speaks to souls through…good books“ – St Teresa of Avila, Interior Castle, "You will not see anyone who is really striving after his advancement who is not given to spiritual reading. And as to him who neglects it, the fact will soon be observed by his progress.” -St Athanasius, "To convert someone, go and take them by the hand and guide them." -St Thomas Aquinas, OP. 1 saint ruins ALL the cynicism in Hell & on Earth. “When we pray we talk to God; when we read God talks to us…All spiritual growth comes from reading and reflection.” -St Isidore of Seville, “Also in some meditations today I earnestly asked our Lord to watch over my compositions that they might do me no harm through the enmity or imprudence of any man or my own; that He would have them as His own and employ or not employ them as He should see fit. And this I believe is heard.” -GM Hopkins, SJ, "Only God knows the good that can come about by reading one good Catholic book." — St. John Bosco, "Why don't you try explaining it to them?" – cf St Peter Canisius, SJ, Doctor of the Church, Doctor of the Catechism, "Already I was coming to appreciate that often apologetics consists of offering theological eye glasses of varying prescriptions to an inquirer. Only one prescription will give him clear sight; all the others will give him at best indistinct sight. What you want him to see—some particular truth of the Faith—will remain fuzzy to him until you come across theological eye glasses that precisely compensate for his particular defect of vision." -Karl Keating, "The more perfectly we know God, the more perfectly we love Him." -St Thomas Aquinas, OP, ST, I-II,67,6 ad 3, “But always when I was without a book, my soul would at once become disturbed, and my thoughts wandered." —St. Teresa of Avila, "Let those who think I have said too little and those who think I have said too much, forgive me; and let those who think I have said just enough thank God with me." –St. Augustine, "Without good books and spiritual reading, it will be morally impossible to save our souls." —St. Alphonsus Liguori "Never read books you aren't sure about. . . even supposing that these bad books are very well written from a literary point of view. Let me ask you this: Would you drink something you knew was poisoned just because it was offered to you in a golden cup?" -St. John Bosco " To teach in order to lead others to faith is the task of every preacher and of each believer." —St. Thomas Aquinas, OP. "Prayer purifies us, reading instructs us. Both are good when both are possible. Otherwise, prayer is better than reading." –St. Isidore of Seville “The aid of spiritual books is for you a necessity.… You, who are in the midst of battle, must protect yourself with the buckler of holy thoughts drawn from good books.” -St. John Chrysostom