1
general::
Phrase(s): come down to earth
1. Lit. to arrive on earth from above. • An angel came down to earth and made an announcement. 2. Fig. to become realistic; to become alert to what is going on around one. • You have a fit of enthusiasm, John, but you must come down to earth. We can’t possibly afford any of your suggestions.
McGrawhill's American Idioms And Phrasal Verbs