Charles H. Spurgeon on Psalms 105:18

Whose feet they hurt with fetters. From this we learn a little more of Joseph's sufferings than we find in the book of Genesis: inspiration had not ceased, and David was as accurate an historian as Moses, for the same Spirit guided his pen. He was laid in iron, or "into iron came his soul." The prayer book version, "the iron entered into his soul, "is ungrammatical, but probably expresses much the same truth. His fetters hurt his mind as well as his body, and well did Jacob say, "The archers shot at him, and sorely grieved him." Under the cruelly false accusation, which he could not disprove, his mind was, as it were, belted and bolted around with iron, and had not the Lord been with him he might have sunk under his sufferings. In all this, and a thousand things besides, he was an admirable type of him who in the highest sense is "the Shepherd, the stone of Israel." The iron fetters were preparing him to wear chains of gold, and making his feet ready to stand on high places. It is even so with all the Lord's afflicted ones, they too shall one day step from their prisons to their thrones.