Among the seven Gifts of the Holy Spirit, only two relate to the speculative power of the mind, and the first of these is the Gift of understanding. This is the Gift by which the intellect penetrates and grasps those holy things that could not be grasped without the special help of divine grace. Happily, this may be one case in which the natural connotations of the English word really do point us in the right direction, because the Gift of understanding does seem to relate to that seeing-within, or that ah ha! feeling, that we associate with the verb ‘to understand.’ St. Thomas speaks of the necessity of seeing what “lies hidden” beneath the external appearances of things — this is what happens when we understand.
Not all understanding relates to the supernatural Gift. We have natural capacities for understanding that can give us insight into natural things. The Gift of understanding allows us to see holy things that could not have been grasped through our natural capacities alone. Thus, when we get intimate insights into the nature of grace, the Sacraments, the lives of the Saints or theological truths of the faith, the Gift of understanding is probably aiding us.
St. Louis-Marie de Montfort,
Pope St. Pius X,
St. Joseph,
St. Ambrose of Milan,
St. Thomas Aquinas,
St. Francis (and St. Clare),
St. Catherine of Siena,
St. Alphonsus Ligouri,
St. John Chrysostom,