Exploration of the natural ...

Exploration of the natural world begins in early childhood, flourishes in middle childhood, and continues in adolescence as a pleasure and a source of strength for social action.
Exploration of the natural world begins in early childhood, flourishes in middle childhood, and continues in adolescence as a pleasure and a source of strength for social action.
 David Sobel

More phrases

Effort only fully releases its reward after a person refuses to quit.
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 Napoleon Hill
Never complain and never explain.
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 Benjamin Disraeli
A good plan violently executed now is better than a perfect plan executed next week.
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 George S. Patton
Problems are not stop signs, they are guidelines.
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 Robert Schuller
Never give up, for that is just the place and time that the tide will turn.
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 Harriet Beecher Stowe

Quotes from the same author

We tiptoed the tops of beaver dams, hopped hummocks, went wading, looked at spring flowers, tried to catcha snake, got lost and found. How fine it was to move at a meandery, child's pace.
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 David Sobel
Wet sneakers and muddy clothes are prerequisites for understanding the water cycle.
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 David Sobel