By Stacy Trasancos, St. Philip Institute of Catechesis and Evangelization - St. Thomas Aquinas said that truth resides in our intellect. That means we grasp truth in two ways. 1) We can know something is true because we observe it with our senses (usually sight) and grasp it with our minds. If you see a rock, then you know it is true that a rock is there because you see it with your own eyes. Knowledge refers to that which is familiar to us.