John Calvin,Lectures on Lamentations, Lecture 10 on 3:24
But Paul meant that the faithful ought so to fix their minds on God alone, that whatever might happen, they would not yet cease to glory in him. Why? because God is their life in death, their light in darkness, their rest in war and tumult, their abundance in penury and want.
It is in the same sense our Prophet now says, when he intimates that none hope in God but those who build on his paternal favor alone, so that they seek nothing else but to have him propitious to them.