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The highest thinkers of the ages, the seers of the tribes and the nations, have been optimists.

Helen Keller
Age, Tribes, Maldives
Helen Keller (2011). “To Live, to Think, to Hope: Inspirational Quotes by Helen Keller”, p.134, Matthew Gordon
The highest thinkers of the ages, the seers of the tribes and the nations, have been optimists.