We see so much that we see nothing.

To really see is to fully comprehend, therefore our capacity for seeing is limited.

No man has really seen Niagara, no man has ever really seen Mont Blanc; for that matter, no man has even fully comprehended so much as a grain of sand; therefore the universe is at one's doorstep.
Nature is a unit; it is not a whole made up of many diverse parts, but is a whole which is inherent in every part.

No two persons see the same things in a blossoming flower; to the botanist it is one thing, to the poet another, to the painter another, to the child a bit of bright color, to the maiden an emblem of love, to the heart-broken woman a cluster of memories; to no two is it precisely the same.
The longer we look at anything, however simple, the deeper it penetrates into our being until it becomes a part of us.

In time we learn to know the tree that shades our porch, but years elapse before we are on friendly terms, and a lifetime is spent before the gnarled giant admits us to intimate companionship.