Ambrose of Milan — as excerpted in the Catena Aurea on Luke 9:51-56

“Mark that He was unwilling to be received by those who He knew had not turned to Him with a simple heart. For if He had wished, He might have made them devout, who were undevout. But God calls those whom He thinks worthy, and whom He wills He makes religious. But why they did not receive Him the Evangelist mentions, saying, Because his face was as if he would go to Jerusalem.”