The light of faith enables us to accept with certainty what cannot be demonstrated by reason. St. Thomas More, in his Meditations and Devotions, makes an important point when he states that a man may believe religious truths, but not appropriate these truths for his own life. In other words, saving faith requires that we relate what we believe to our ordinary actions. Obedience must accompany belief. There is a danger that we focus too exclusively on assenting knowledge, making faith primarily a head trip.
Faith is mainly trust.
He accepted God as the God of the impossible, surrendering all to Him. The virtue of faith, which we receive as a gift from God in baptism, enables us to believe and to trust. This saving faith is the source of all religious life, and it causes us to rely on God in all the circumstances of our lives. We begin to realize that with saving faith all things will work together for good. Jesus has won the victory, and we can depend upon Him more and more.