The thing that makes me wonder about people is this: Can you or the people you associate with really know why you think what you think?  Let’s start with this presumption: no one is exempt from a belief system, from a set of beliefs. If you wake up in the morning and get out of bed, you believe in something.( I could even argue that is still the case even if you  stayed in bed) No one is immune from this. There exists no such thing as a neutral or valueless position. This means that all behavior is guided by what you believe and think. All your actions, known as “human acts” things that you willfully do in a rational manner has for its foundation a set of beliefs. Yet the vast percentage of the population doesn’t know why they believe what they believe.  People operate under a series of information, sometimes never tested for validity or certitude. bits and pieces of information garnered through numerous sources, varying in their degrees of reliability. All the while the thought that there may be a God who loves us and desires us to be with Him is dismissed as foolish or fantasy. St. Thomas Aquinas, the great philosopher and theologian used his rational mind to see whether in  fact that a belief in God made sense, that it would stand both under rational scrutiny and yet remain the mystery of this God, whom it takes so much to know. The Apostles met Him personally, they testified to that fact.Peter told us as much: “We did not follow cleverly devised myths when we made known to you the power and coming  of our Lord Jesus Christ, but we had been eyewitnesses of his majesty. For he received honor and glory from God the Father when that unique declaration came to him from the majestic glory, “This is my Son, my beloved, with whom I am well pleased'” “We ourselves heard this voice come from heaven while we were with him on the holy mountain. Moreover, we possess the prophetic message that is altogether reliable. You will do well to be attentive to it, as to a lamp shining in a dark place, until day dawns and the morning star rises in your hearts. Know this first of all, that there is no prophecy of scripture that is a matter of personal interpretation,for no prophecy ever came through human will; but rather human beings moved by the Holy Spirit spoke under the influence of God.” 2 Peter 1:16-21