What does that unbelief look like? For those who call themselves Christians it’s almost never a formal unbelief: “I no longer believe in God or Jesus, etc.” It’s a functional unbelief—an unbelief that plays out in our actions more than in our words.
You may be able to mask spiritual drift and a neglect in public, but what would a quick peek into your soul reveal to your brothers and sisters in Christ? Would it reveal the marks of spiritual discipline, or of spiritual drift?