"Genius is divine perseverance." Divine patience I believe he originally used, perseverance is better in my opinion. Genius I cannot claim nor even extra brightness but perseverance all can have.
For, though the origin of most of our words is forgotten, each word was at first a stroke of genius, and obtained currency, because for the moment it symbolized the world to the first speaker and to the hearer. The etymologist finds the deadest word to have been once a brilliant picture.