We would often be sorry if our wishes were gratified.

Aesop (620?-560? BC) Legendary Greek storyteller

Fables [Aesopica], “The Old Man and Death” (6th C BC) [tr. Jacobs (1894)]
    (Source)

Alternate translation: "It is one thing to call for Death, and another to see him coming." [tr. James (1848)]