come back (down) to earth

come back (down) to earth

To regain a realistic view of or attitude about something. Those newlyweds think that marriage is utterly blissful, but they'll come back to earth soon enough.
See also: back, come, earth

come back (down) to earth (or bring someone back (down) to earth)

return or make someone return suddenly to reality after a period of daydreaming or euphoria.
2003 Guardian When you start to believe you're in with a shout, the big boys have a nasty habit of bringing you down to earth with a bump.
See also: back, come, earth