The Rationality of Biblical Faith 2
He will use every kind of evil deception to fool those on their way to destruction, because they refuse to love and accept the truth that would save them. So God will cause them to be greatly deceived, and they will believe these lies. Then they will be condemned for enjoying evil rather than believing the truth.
(2 Thess. 2:10-12 NLT)
I have said that, Biblically speaking, “to have faith in” is to believe the truth about something and to act accordingly. It is not wishful thinking, and it is not “a leap into the dark. In his book He is There, and He is Not Silent, Francis Shaeffer has a fine illustration of this point.
He imagines a climber in the Alps who has not kept careful track of his time, and is high up on a narrow ledge in the late afternoon when he is suddenly engulfed in clouds. He cannot see forward or back, and knows only that there is a bottomless chasm on his left and a sheer cliff on his right. He cannot stay where he is, for with the falling nighttime temperatures, he will be dead of exposure before morning.
But suddenly, a voice comes out of the fog, telling him that if he will lower himself over the side of the ledge, and let go, he will only fall a few feet and will land on a lower ledge where there is a cave in which he can shelter. If he does hang off the edge of that ledge and let go, that is not faith, but foolishness.
But suppose the climber calls out to the voice, and learns that the speaker is the foremost guide in that area, that he is just across that gulf, and knows the area perfectly, being able to tell the climber some of the features on that path where he is. Now if the climber does hang off the edge of that cliff, he will still feel nothing but air beneath his feet. But when he lets go, that will be faith in the true Biblical sense; more than rational, but not irrational.