There’s no way to distinguish fairly between people who are genuinely fired up about Jesus and people who are performatively On Fire For Jesus, but a culture that promotes zeal as a value in and of itself creates a lot of pressure to put your piety on display for others.
The post is mainly concerned with evangelical Christianity, but the dynamic it points out should be concerning for any faith that makes feeling it the primary unit of worship—like, say, Quakers. There’s a passage in Beyond Majority Rule where Michael Sheeran, a Catholic priest, compares Quaker worship, particularly the phenomenon of the gathered meeting, to the Catholic rite of the Eucharist. He notes that, while Quakers like to say that the experience of God in the gathered meeting is like the presence of Christ in the bread and the wine, Catholic doctrine holds that the presence is there whether the worshippers experience it or not. So much of our spiritual life revolves around being led, being accompanied, touching and even tasting the Spirit; but if it’s not there, what fills the void? Or rather, what are we willing to call the presence of the Spirit, even if its provenance is doubtful? As Guyton notes, evangelical culture promotes zeal for zeal’s sake, or a sort of enforced positivity; among Quakers, I’ve seen everything from white middle-class ethics to revolutionary politics fill in as substitutes. We should take care, then, not to baptize our own passions, or make them into idols.