I roamed the countryside ...

I roamed the countryside searching for answers to things I did not understand. Why shells existed on the tops of mountains. How the various circles of water form around the spot which has been struck by a stone, and why a bird sustains itself in the air.
I roamed the countryside searching for answers to things I did not understand. Why shells existed on the tops of mountains. How the various circles of water form around the spot which has been struck by a stone, and why a bird sustains itself in the air.
 Leonardo da Vinci

Quotes from the same author

All our knowledge has its origins in our perceptions.
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 Leonardo da Vinci
It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.
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 Leonardo da Vinci
Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigor of the mind.
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 Leonardo da Vinci
Nothing strengthens authority so much as silence.
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 Leonardo da Vinci
He who is fixed to a star does not change his mind.
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 Leonardo da Vinci