Theism may mean different things to different people but the general idea is to believe that there is Intelligent Design and a purpose for each of our lives. So most people pray, or have some kind of internal dialogue when wanting guidance, help or to give thanks etc. Having a perfect external point to focus on is a way to do better, as the destination cannot be reached but it gives us a direction. People without this relationship will naturally feel more lonely and not be aided to achieve as much as they would with that communication.