If we were to ever reach a point in our lives where we felt the evidence -- for, or against, Christ's divinity or the Book of Mormon, or Joseph Smith's prophetic calling -- were overwhelming, then there would be a kind of intellectual compulsion involved, and our faith would not be a matter of choice.
I've been trying to put that thought to words for almost 2 years. My experience so far has been that whenever I feel like the evidence weighs more heavily on one side than another, it's only because I haven't looked hard enough for the counterpoints on the other side.
But why faith? Because this life is principally a test of spirit. Sure knowledge eliminates the wrong answers from the test, and it ceases to be a valid test for the spirit, and instead becomes a simple test of will, which is interesting, but insufficient.
Russian soldiers in WWII who ran from the front line were shot by their own men -- how do you award medals of honor when valor is forced on you?