Matthew Henry on Jeremiah 39:1-10

Jerusalem was so strong, that the inhabitants believed the enemy could never enter it. But sin provoked God to withdraw his protection, and then it was as weak as other cities. Zedekiah had his eyes put out; so he was condemned to darkness who had shut his eyes against the clear light of God's word. Those who will not believe God's words, will be convinced by the event. Observe the wonderful changes of Providence, how uncertain are earthly possessions; and see the just dealings of Providence: but whether the Lord makes men poor or rich, nothing will profit them while they cleave to their sins.