"Whether God watches through the windows or through the lattices," said Rabbi Yisrael of Salant, "God watches over us. The difference is that sometimes it is through a window, and then we can see Him just as He sees us. At other times, it is through a crack in the partition, where He can see us, but we do not see Him."
Both in the history of the nation and in our personal lives, there have been times when Divine intervention was manifest. There have also been times when we were in great distress and felt abandoned, but even then, though God seemed to be absent, He was watching over us. The Torah foretold that there would be times of anguish when we would feel that God is not among us. At such times we must strengthen our faith and declare, "Behold, the Keeper of Israel does not sleep nor slumber."
Commenting on the verse, He does great marvels alone (Psalms 136:4), our Sages tell us that "alone" means that only God is aware of some of the miracles He performs for us, because we are unable to recognize them as such. Those who failed to see the protective hand of God when the Iraqis rained scuds on Israel were morally and psychologically blind; anyone should have been aware of God's protection. But even when His intervention is less evident, we must know that He watches over us, albeit "through cracks in the lattices."