"Why does God open one man’s eyes and not another’s? Paul (Rom. 9) forbids to ask why; for it is too deep for man’s capacity. God we see is honoured thereby, and His mercy set out and the more seen in the vessels of mercy. But the popish can suffer God to have no secret, hid to Himself. They have searched to come to the bottom of His bottomless wisdom: and because they cannot attain to that secret, and be too proud to let it alone, and to grant themselves ignorant, with the apostle, that knew no other than God’s glory in the elect; they go and set up free-will with the heathen philosophers, and say that a man’s free-will is the cause why God chooses one and not another, contrary unto all the Scripture."
- From Ligonier Ministries