The "Rarity Of Grace"

I was discussing today the fact that very few people understand grace. Even in the Church, it tends to be very few. I myself only came to understand grace half way through my theological studies, and was annoyed that no one had made it clear to me sooner. Yet perhaps it could not have been sooner. Whether or not the Calvinist doctrine is true, I see something like it at work in the world around me: in God's time, people's eyes are opened to grace, and not before.