The metaphor speaks volumes. No express way for anyone. We are all on equal ground. Walk up several steps, then there is a small landing. This is where we can either take a break or continue on. Or, as in some people's case, they may choose to go back down the stairs. The climb is too hard they say and go back to living at ground level.
We can take this even further and see that each step is its own level of happiness. As we continue onward and upward the scenery changes ever so slightly. And, no matter what we always take ourselves with us. We can view the climb as necessary and strenuous to "reach" enlightenment or happiness.
Or...we can be in awe of the process. Allow happiness to chase us. It's our view of life that shifts our perspective and ultimately our reality.