Lydia's heart which was before shut and barred, with the bars of ignorance, hardness, and unbelief. The heart of a sinner before conversion, is like a house shut up, and wholly in darkness; whatever degree of natural or moral light is in it, there is none in spiritual things; it is empty of the grace of God, of the fear of him, and love to him; it is without proper inhabitants, without God, Christ, and the Spirit; and is the habitation of devils, and the hold of every foul spirit, who delight in dark and desolate places; it is bolted and barred with unbelief, and walled up, and even petrified and hardened with sin, and is guarded and garrisoned by Satan, and its goods are kept in peace by him: and this had been the case of Lydia; but now the Lord opened her understanding, and put light into it, which was before darkness itself; as to spiritual things; by which she saw her wretched, sinful, and miserable state by nature, the insufficiency of all ways and means, and works, to justify and save her, and the necessity, suitableness, and fulness of grace and salvation by Christ; which was done by the same divine power, that at first created light in darkness: moreover, the Lord wrought upon her affections, and engaged them to divine and spiritual things; creating love in her soul to Christ, to his people, truths and ordinances; which was done by his almighty hand, taking away the stony heart, and giving an heart of flesh: he also removed the bar of unbelief, entered in himself, dispossessed Satan, and worked faith in her, to look to him, lay hold on him, and receive him, as her Saviour and Redeemer; making her willing in the day of his power, to be saved by him, and to serve him.
(Commentary John Gill)
(Commentary John Gill)