I think for most people they try to always associate the time they spend with a feeling such as content or suprised or tired. But in reality everything is reality and that means that what you are feeling now is your life, as life is not guarenteed, and it is in this way god telling you in your mind that you need to change, become happy, and live a happy life. your body is depressed because you are doing something physically or emmotionally wrong, whatever it is, and all your body knows is that it wants it to be fixed so it can become happy. Find contentment in the little things and everything will become better.