Read it through once

I had to visit Niagara fifteen times before I succeeded in getting my imaginary Falls gauged to the actuality and could begin to sanely and wholesomely wonder at them for what they were, not what I had expected them to be. When I first approached them it was with my face lifted toward the sky, for I thought I was going to see an Atlantic ocean pouring down thence over cloud-vexed Himalayan heights, a sea-green wall of water sixty miles front and six miles high, and so, when the toy reality came suddenly into view—that beruffled little wet apron hanging out to dry—the shock was too much for me, and I fell with a dull thud.