As Blake wrote:
"If the doors of perception were cleansed everything would appear to man as it is, infinite."
The corollary to this is:
"If the doors of perception were dulled everything would appear to man as it isn't, finite." And one could add "banal & mediocre." The amount of thought gone into trying to prove that life is exactly this banality; people clinging to mediocrity & unhappiness as if it were their greatest possession. Though I suppose to their experience it is their greatest & only possession; it is who they are & so their defence of their reality is natural. "Here I am. Pull up the drawbridge!" Their thought, naturally enough, mirroring their sense of themselves & their sense of themselves mirroring their thought. Which came first? One of the great insolubles.