J. C. Ryle’s remarks on John 18:28–

It is no uncommon thing to find people excessively particular about the observance of trifling forms and outward ceremonies, while they are the slaves of degrading sins and detestable immoralities. Robbers and murderers in some countries are extremely strict about confession, and absolution, and prayers to saints. Fastings and self-imposed austerities in Lent, are often followed by excess of worldliness when Lent is over. There is but a step from Lent to Carnival. The attendants at daily services in the morning are not unfrequently the patrons of balls and theaters at night. All these are symptoms of spiritual disease, and a heart secretly dissatisfied…

A religion that makes a man neglect the weighter matters of daily holiness and separation from the world, and concentrate his whole attention on forms, sacraments, ceremonies, and public services, is to say the least, very suspicious.