One very, very basic measurement / thought experiment for holiness in Christian circles to think about is the following:

Imagine Christianity is illegal. Imagine the government decides to prosecute you, but hires the weakest, most incompetent, repeatedly-almost-disbarred prosecutor there is. You meanwhile get access to David Boies. Would the government have enough evidence for even the worst prosecutor to prove you are a Christian?

Well, if not… it’s like Mozilla doesn’t realize that religious people don’t mind prayer being a fairly public act as long as people against them aren’t preying on them. Catholics have Mass every Sunday; Muslims have their five-times-daily prayers and often wear clothing that clearly identifies them as such; and so forth.