Two rival versions of moderate religious practice
I like these two diagrams as a way of explaining why it’s not always better to be stricter with oneself.
Some people assume that moderation in the spiritual life is a code word for lukewarmness:
As a result, they don’t have any defenses against any immoderate religious practice, so long as it points to being stricter. Someone mentions Saint so-and-so, who lived on nothing but the Eucharist, and the person thinks, either, “that’s what it takes to be a saint” or even, “I know my diet from now on.” This mentality was behind the Jansenist heresy in the Church, which basically held that any concession to human weakness made one ineligible to receive Communion. This mentality is also characteristic of the spiritual disease of scruples.
The correct way to think about moderation in religious practice is expressed in this diagram:
Here the moderation in religious practice is virtuous, a “mean between the extremes” in the ancient description of virtue. People with scruples often don’t understand this, which is why not only do they keep adopting stricter and stricter standards for their behavior, but why also they find themselves in despair when they fall short of those strictest standards.