Reason on the other hand is based almost entirely on what you can see, hear, touch, smell, or taste. It is the idea of Logic. If you can see the leaves moving, you know that it is windy outside. If it hurts when you touch the stove, you know that it is hot.
Faith and Reason are both involved whenever we receive inspiration from the Lord.
Remember to Pray Always when seeking guidance from the Lord. (Doctrine and Covenants 10:5)
I myself have thought long and hard about the Book of Mormon and the Bible. I have prayed and asked God, MY Heavenly Father, to let me know whether or not they are true. He has answered my prayers and thus by Reason and Faith I KNOW that they are truly the word of God.