I find that the environment surrounding you also plays an important role. When I'm close to nature, surrounded by an open, welcoming, non-judging community, where each individual feels free to express themselves without trying to conform to any expectations, I'm by default a lot closer to this desired state of mind than in my everyday city life, full of depressed, angry, rushing people trying to live up to certain customary and imaginary expectations.

In this sense, I believe our misguided society plays a large role in constantly rebuilding that wall. Otherwise, meditation might not even be needed.