The days of our lives, for all of us, are numbered. We know that. And yes, there are certainly times when we aren't able to muster as much strength and patience as we would like. It's called being human.
For many people, the reluctance to embrace Christianity is as practical as it is intellectual. They want to know what the benefits of Christianity are, or what's in it for them.
A scientific man ought to have no wishes, no affections, - a mere heart of stone.