Welcome to the daily chizuk (encouragement). One of the definitions the Mefarshim (commentators) give for the word emunah is based on a pasuk (verse): A nursing mother is an omen, and emunah is described as a child nursing from his mother. David HaMelech described himself in Tehillim: “His soul is like a suckling baby.” And the Vilna Gaon explains: Just as a nursing child is satisfied and, after he eats, doesn't worry about the next meal, so too is someone with emunah. A nursing child is totally dependent, totally content. No matter where he is, he's always in the same place, in his mother's arms. If his mother is at home, he's in his mother's arms. If she goes to a friend, he's in his mother's arms. If she goes to another town, he's in his mother's arms. He doesn't even change positions. He's in his own world of satisfaction.
Rabbi Waxman once said, “Imagine when the trains were going to Auschwitz, the terror there must have been. But there were also mothers nursing their babies, and those babies were still content. They were in a different world.” If someone becomes dependent on Hashem, no matter where he is, he will always feel the security of being in his mother's arms. Someone once told me he was walking through a very dangerous neighborhood with his six-year-old daughter. He was very frightened, and he looked at his daughter walking happily. She was oblivious to the situation because she was holding her daddy's hands. When my father is with me, I have nothing to fear. Hashem li lo ira (Hashem is with me; I will not fear). To have this feeling in life is priceless: the feeling of security. There's someone else looking out for me, but not just anyone: someone who loves me more than I love myself. I'm never alone. I'm always being taken care of.
Sometimes people have trouble falling asleep at night. They have anxiety. David HaMelech said, in the midst of running away from his own son, “When I lie down, I'm able to fall asleep.” Why? Because I know I'm being held by Hashem. The baby falls asleep so easily in its mother's arms, and that's exactly the way David HaMelech felt. Also, the milk that the mother produces is genetically designed for the baby's metabolism. So too, someone with emunah knows everything that's given to him is exactly what he needs to be successful in life. As David said, “Hashem is my shepherd. I am never lacking.” These are the feelings of people, and these are the feelings we're striving to reach.