English Art/Literary Religion 19th century text

I make no excuse for including the Lord's Supper among the leading points of "practical" Christianity. I firmly believe that ignorant views or false doctrine about this ordinance lie at the root of some of the present divisions of professing Christians. Some neglect it altogether; some completely misunderstand it; some exalt it to a position it was never meant to occupy, and turn it into an idol. If I can throw a little light on it, and clear up the doubts in some minds, I will feel very thankful. It is hopeless, I fear, to expect that the controversy about the Lord's Supper will ever be finally closed until the Lord comes. But it is not too much to hope that the fog and mystery and obscurity with which it is surrounded in some minds, may be cleared away by plain Bible truth.

This is a fragment of a book called Practical Religion, by J C Ryle.

What did he mean: I don't want anybody to use this as an excuse or I include the Lord's Supper between the leading points of practical religion and give no excuse for doing that?