bring down to earth
bring (one) down to earth
To cause one who is fantasizing or being overly optimistic to remember or consider reality. I was excited to book a vacation until my nearly-depleted bank account brought me down to earth. Dean was thrilled to get into his dream school, but the realization that he would have to pay for it entirely on his own brought him down to earth.
bring someone down to earth
Fig. to help someone face reality; to help someone who is euphoric become more realistic. The events helped bring us all down to earth. I hate to be the one to bring you down to earth, but things aren't as good as you think.