2. Another strong Fort or Castle, that sin raiseth up in the Soul, is hardness of heart; hence it is called in Scripture, an heart of stone, or a stony heart, 11.
Ezek. 19. we account Castles that are built with Free-stone, and on Rocks, the strongest Castles. O, sin makes it self strong, when it makes it self a Fort, and a Castle of stone in the heart. Oh! how hard is it to get sin out of such an heart, 'tis like a stone hardned in sin; lay a Mountain upon a stone (saith a late Divine) and it never groans, so is it with sinners, let a Moun∣tain of sin, a World of guilt lye upon his Soul, he feels it not, he groans not under it; smite a stone while you will, beat it as long as you can stand over it, it com∣plains not; Oh, reprove sinners, beat them with the hammer of the word of God, they are not moved at all, they complain never the more of sin, read 6.
Hosea 5. God hews sinners by the Preaching of the word as a Mason doth hew stones and cut them, yet are they stones still v. 7. A stone will not bend nor bow, break it you may, but bend it you cannot; so sinners, let them hear the best Sermons, sit under the most powerful Preaching and pathetical per∣suasions,