"Like any dogma, it is honored far more in the breach than in the observance."
As is appropriate when the dogma in question is trivially observed yet distracting when breached. I would expect dogma to be encouraged with honor for observance more when the reverse is the case. For example, when a dogma pertains to a particularly noble or self sacrificial action that is far rarer than the 'null' breach.
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.