Christianity, as opposed to the philosophies of man, attracts reckless devotion because it demands absolute faith. The philosopher and the scientist aspires to explain away all mysteries, to dissolve them into the light of human reason. It is natural for the natural man to attempt to put all things in a test tube so they can observed, explain, and control all things. But Christianity on the other hand, demands and passionately pursues the mysterious. In fact, it is the unknown of the supernatural, not the predictability of the natural, which constitutes the very essence of worship.
The first verse of chapter one in the book of Hebrews explains it well. Christian faith is the substance of things hoped for, and the convictions of things not seen. In other words, the value of Christian faith is that it believes the unbelievable.
Take Away: The value of Christian faith is that it believes the unbelievable.