The line comes from What a Wonderful World, written by Bob Thiele and George David Weiss and recorded by Louis Armstrong in 1967. The song became one of Armstrong's most beloved standards, known for its hopeful view of everyday beauty. Online, editors often isolate just the opening phrase and stop before the title line, creating a brief moment of anticipation. That pause makes the clip work as both a sincere reaction and a setup for irony, which is why it keeps appearing in edits, memes and short videos.