It states (Tehillim 92:3) ואמונתך חסדך בבקר להגיד בלילות, "To declare your kindness in the morning and your emunah at night." The night represents difficult times, and the morning represents the times when Hashem's chesed is revealed. At night, when we go through hardship, we must be strong with our emunah and believe it is all good.
The Akeidas Yitzchak of Alexander zt'l and several of his chasidim were in a concentration camp, and the Nazis told them to prepare for the showers. They knew that this meant the gas chambers and then the crematoria. During the last moments of their lives, the chasidim asked their Rebbe to tell them a dvar Torah. It was an awesome moment. He spoke to them about the pasuk בלילות ואמונתך חסדך בבקר להגיד, "To declare Your kindness in the morning and Your emunah at night." He asked, "The Jewish nation has emunah, so it should have said בלילות ואמונתנו, 'our emunah' at night. Why does the pasuk say בלילות ואמונתך, 'Your emunah at night'?" He answered that אמונתך is speaking about Hashem's emunah. What is Hashem's emunah? Hashem has emunah in us. Hashem trusts that we will pass the tests that He sends us. And even when it is nighttime, and the challenges are intense, Hashem believes that we will pass the test and continue to believe in Him.
