They have a reasonable faith, but it's a cold one. Other folks are so committed to ideas of the mind that they don't have any faith at all. They join philosophers like Nietzsche and Feuerbach, who claimed that religion was merely a crutch for those who lacked faith in pure reason. These people have fallen down before the gods of science and technology and leave no room at all for faith. Yet there is something wrong, even something unhealthy, with head faith which excludes heart faith.
Life is empty without emotion.
Reason is useless without an experience of God. When God touches your heart, you become fully alive. The increasing popularity of the highly emotional churches like the Pentecostals tell us that our society craves a religion of the heart. Many Christians today need to ask God for a heart. Jesus said to love God with all your heart, mind, soul, and strength.