Convictions are the product of both head and heart. There is an emotional component to belief, as well as an intellectual component. The Christian tradition speaks powerfully of the commitment of belief as a matter of the heart. Christian convictions take possession of our heads and hearts through Christian teaching and the preaching of God’s Word. As a matter of fact, most of us gain our most fundamental convictions in just this way - we hear them, see them to be truly revealed in the Bible, and then believe them.
Albert Mohler