I suppose if it's a long and narrow Bible you could use it as a splint.

Actually there is a scientific explanation for this kind of thing, called "regression to the mean". Most things generally get better on their own without any outside intervention. However, when a condition is at its worst people sometimes say a prayer, consult their favourite alternative therapist or even go to a doctor. The condition would have improved anyway but people think it improved because they said a prayer or went to the doctor. This is called regression to the mean because the mean is the "average" or normal for most people and over time most conditions will return (or regress) to it on their own. One of the ideas behind medical science is finding out what interventions actually have effects beyond what regression to the mean does.