The message deleted from your screen may remain part of someone else’s day.

Deleting removes a message from your view rather than from the world. Once something has been read it has already done its work: felt, thought about, folded into somebody’s afternoon, and no button reaches back into that. What you erased is the record, not the effect. A tidy screen can persuade you that more has been undone than actually was.

If you regret something you sent, follow it with a real sentence rather than a deletion. Say what you meant and that you got it wrong. And in a hot moment, remember that the sending is the part still under your control.