So, how do you get back to heaven? To begin with, just notice the thoughts that take you away from it. You don't have to believe everything your thoughts tell you. Just become familiar with the particular thoughts you use to deprive yourself of happiness. It may seem strange at first to get to know yourself in this way, but becoming familiar with your stressful thoughts will show you the way home to everything you need.
The basics teachings of Buddha are about understanding what we are, who we are, why we are. When we begin to realize what we are, who we are, why we are, then we begin to realize what we are not, who we are not, why we are not. We begin to realize that we don’t have basic, substantial, solid, fundamental ground that we can exert anymore. We begin to realize that our ideas of security and our concept of freedom have been purely phantom experiences.
When you rest in quietness and your image of yourself fades, and your image of the world fades, and your ideas of others fade, what's left? A brightness, a radiant emptiness that is simply what you are.