A way to see the beauty of this work is to cut it in half. In fact, Hopper invites us to cut it in half. If you extend the exact centre of the painting into a vertical line, you see this;

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Can you see the dark sliver of a triangle above the partial word “ILLIES”? This is intentionally a work of two halves.

The right hand-side would work, just about,  as a fully-formed painting in its own right.

However, the true beauty of this work only appears when the counterbalancing void is supplied by the left hand-side.

Nothing is everything.

Hopper’s use of space alerts us to a modern masterpiece.