Daily Chizuk #0756

In the mabul, the entire world perished, but Hashem wanted to keep Noach and his family alive, as well as all the animals. Some explain, it was Hashem Himself who brought the mabul, not the destroying angel, and therefore Hashem distinguished between the tzaddik and the rasha. Others explain, Hashem told Noach to go into the teiva, because that was a place where the destroying angel did not have authority.
Everything that happens is determined only by Hashem, and so we should always feel comfortable knowing that for sure whatever happened was the best outcome possible.