Cyril of Alexandria — on Rom 8:28 (EXPLANATION OF THE LETTER TO THE ROMANS)

“To be called according to God's purpose is to be called according to the will. But is this the will of the one who calls or the will of those who are called? Naturally, every impulse which leads to righteousness comes from God the Father. Christ himself once said: "No one can come to me unless the Father draws him." Nevertheless it is not wrong to say that some are called according to God's purpose and according to their own intentions as well.”