The human foot is a masterpiece of engineering and a work of art.

Author: Leonardo da Vinci

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The deeper the feeling, the greater the pain.

Learning never exhausts the mind.

A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.

For once you have tasted flight you will walk the earth with your eyes turned skywards for there you have been and there you will long to return.

The only way to escape the corruptible effect of praise is to go on working.

The further a society drifts from the truth, the more it will hate those who speak it.

The big secret in life is that there is no big secret. Whatever your goal, you can get there if you're willing to work.

Just as true humor is laughter at oneself, true humanity is knowledge of oneself.