I’ve always loved the story in Acts about Lydia coming to faith in Christ when Paul was telling her about Jesus by the side of a river near Philippi. Here’s how Luke summarized it: “A God-fearing woman named Lydia, a dealer in purple cloth from the city of Thyatira, was listening. The Lord opened her heart to respond to what Paul was saying” (Acts 16:14, CSB). Here’s a helpful commentary – and I especially like that last paragraph:
…Observe then in the ‘opening of the heart’ these things.
1. First, The heart is naturally shut and closed up, as indeed it is to spiritual things. It is open enough to the world, and to base contentments here; but it is shut to heaven and heavenly things. Naturally it is clean locked up – partly in its own nature, being corrupt and earthly; partly because Satan he besiegeth all the senses, and shuts up all. There is a spirit of deafness and blindness, and a spirit of darkness and deafness in people, before God hath brought them by the powerful work of the gospel from the kingdom of Satan, that possesseth every man naturally. Naturally therefore our hearts are not open, but locked and shut up. That is supposed here. So that except God be merciful to break the prison, as it were, whereby by unbelief and the wickedness of our nature we are shut up, there is no hope of salvation at all. God opens the heart.
2. The second thing is this, that as our hearts are shut and closed up naturally, so God, and God alone, opens the heart, by his Spirit in the use of the means. God opened Lydia’s heart.
God hath many keys. He hath the key of heaven to command the rain to come down. He hath the key of the womb; the key of hell and the grave; and the key of the heart especially. ‘He opens, and no man shuts; and shuts and no man opens,’ Rev. 3:7. He hath the key of the heart to open the understanding, the memory, the will, and affections. God, and God only, hath the key of the heart to open that. It is his prerogative. He made the heart, and he only hath to do with the heart. He can unmake it, and make it new again, as those that make locks can do. And if the heart be in ill temper, he can take it in pieces, and bring it to nothing as it were, as it must be before conversion; and he can make it a new heart again. It is God that opens the heart, and God only. All the angels in heaven cannot give one grace, not the least grace. Grace comes merely [altogether] from God. It is merely from God. All the creatures in the world cannot open the heart, but God only by his Holy Spirit. For nature cannot do above its sphere, as we say, above its own power. Natural things can do but natural things. For nature to raise itself up to believe heavenly things, it cannot be. Therefore as you see vapours go as high as the sun draws them up, and no higher, so the soul of man is lift up to heavenly things by the power of God’s Spirit. God draws us and then we follow. God, I say, only openeth the heart.
Covenant Presbyterian Church (OPC)
Hammond, WI, 54015