You will never reach the place where you will not need to be diligent about your choice of thought. Because you live in a world that is determined to show you every pocket of despair. So you must diligently choose. But it gets easier and easier and easier to do so.
Right now, it may feel to you like those moments of Connection are the rare ones. There will be a time when those moments of Connection will feel so normal that it will shock you when you get into a place of disconnection.