When you leave salt out of a bread recipe, it looks pretty much normal. But take a bite, and you find the loaf bland, flat, and un-bread-like.
With the salt, the bread doesn’t taste salty – it tastes bready. It taste like it’s supposed to.
Be the salt of your choir. Contribute not by drawing attention to yourself, but by making the choir sound more the choir. Be a singer we’d miss if you were gone, but not because you stand out when you’re there.