The grace of the Lord Jesus Christ be with your spirit.
It's the last line of a letter — the kind of thing you might skim past on your way to close the book. "The grace of the Lord Jesus Christ be with your spirit." But endings say something too, and this is how Paul chose to leave off: not with a final instruction or warning, but with grace, spoken over the most private part of a person, their spirit.
Grace isn't the same as approval you've earned. It's favor given to people who haven't necessarily done anything to deserve it — which is exactly why it's difficult to trust at first. Most of what we're offered in life comes with conditions attached, spoken or not.
This is a blessing with no strings visible in the text — a wish that something undeserved would simply be with you, settle over your spirit, and stay there. Whether or not you've ever experienced grace like that, it's worth noticing that it was offered here without qualification.
If grace with no strings attached sounds unfamiliar, that alone might be reason enough to look into where it comes from.
A short video on this is coming soon — for now, read on.