From the Fathers

"Do not pray that things may be according to your desires, for they are not always in keeping with the will of God. Better pray as you were taught, saying: "Thy will be done" on me (Matthew 6:10). And ask thus about all things, for He always desires what is good and profitable for your soul, whereas you do not always seek it."

St Nilus of Mt Sinai from "153 Texts on Prayer", in "Early Fathers From thePhilokalia.