All our mental conquests seem nothing compared with That.
One can penetrate the secrets of nature; one can understand what science tells us about the first moments of the physical creation. But that is nothing, or almost nothing. One is left speechless when the first glimmerings beyond of mind are present, beyond any doubt. Then, the walker seems to fall into a kind of paralysis that prevents him living the normal life.
All the old certainties crumble and the abyss opens before you.
You can not go back. You can not because you have seen.
You have to jump.