If you're taking about addiction. There is only right now. In effective it's a small window one millimeter wide. Technically you get an infinite number of them but that one that you just missed kicked you're ass worse than the substance ever did. That door you didn't step through was anmazing life that you could not even begin to imagine. That next millimeter wide door? Its okay maybe nor what you could have had, but definitely better than the the next , and forcibly better than the comfortable well known path that you are aligned with.