“It ought to be a settled principle in our minds, that a man’s soul is in a bad state, when he begins to regard man-made rites and ceremonies, as things of superior importance, and exalts them above the preaching of the Gospel.
It is a symptom of spiritual disease. There is mischief within. It is too often the resource of an uneasy conscience. The first steps of apostasy from Protestantism to Romanism have often been in this direction.
No wonder that St. Paul said to the Galatians, ‘Ye observe days, and months, and times, and years. I am afraid of you, lest I have bestowed on you labour in vain,’ (Gal. 4:10, 11).”
–J.C. Ryle, Expository Thoughts on Mark (Carlisle, PA: Banner of Truth Trust, 1857/2012), 30. Ryle is commenting on Mark 2:23-28.