The second of the Seven Gifts of the Holy Spirit is “Understanding.”
According to Catholic Answers::
Understanding is penetrating insight into the very heart of things, especially those higher truths that are necessary for our eternal salvation—in effect, the ability to “see” God.
By “seeing” God I think they are referring to understanding Him through His revelations. There are two revelations of God: The personal self-revelation of His by means of the Prophets, Patriarchs and so on until His Son’s Incarnation, Death and Resurrection; and afterwards with the Apostles and their direct descendents: the Popes and Bishops of the Church in union the Pope. The other revelation is knowing God through His works, that it, Creation. The means for understanding Creation is the methodology and disciplines of Science. Therefore, Religion and Science are the twin paths of Divine Revelation. I think that St. Augutine of Hippo came up with this first and was echoed by Pope St. John Paul II.
If we are endowed with the Holy Spirit’s Gift of Understanding, we will have greater insight into the Truths of the Faith, and, properly guided by Faith and with humble intention, the workings of Nature. Who knows what we can accomplish? (I have a personal convition that since scientists are typically agnostic or outright atheists, their ability to make deep discoveries in Science is limited. If you do not acknowledge the Creator, how can you fully understand His creations? It’s like trying to understand what an author ‘was getting at’ in their novel, but refusing to learn anything about the author. Of course, it’s possible to enjoy the novel anyway, but if you have a knowledge of the author’s life, you come to have a greater grasp of particular scene if it’s autobiographical or representative of the author’s belief system.)
My two other books are still available! "The Stations of the Cross for Alcoholics" and "The Recovery Rosary: Reflections for Alcoholics and Addicts" (Thank you!!)