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I made slow Riches but my Gain
Was steady as the Sun
And every Night, it numbered more
Than the preceding One
All Days, I did not earn the same
But my perceiveless Gain
Inferred the less by Growing than
The Sum that it had grown.
Emily Dickinson
http://www.poemhunter.com/poem/i-made-slow-riches-but-my-gain/