If you take one rivet out of an airplane, it will be all right, it'll keep flying. You take another rivet out of the airplane and it still flies. So what the heck, let's take more rivets out of the airplane, and sooner or later, the airplane drops from the sky.
I run a lot. I have this five-mile run that I try and do a few times a week. If I do more, I get shin splints and it drives me mad, so I have to balance it.
But the more we search the Scriptures, the more we perceive, in this doctrine, the fundamental truth of the gospel - that truth which gives to redemption its character, and to all other truths their real power.