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The learning and knowledge that we have,is,at the most,but little compared with that of which we are ignorant.

Socrates, Plato, Aristotle (1967). “Wit and Wisdom of Socrates, Plato, Aristotle: Being a Treasury of Thousands of Glorious, Inspiring and Imperishable Thoughts, Views and Observations of the Three Great Greek Philosophers, Classified Under about Four Hundred Subjects for Comparative Study”
The learning and knowledge that we have,is,at the most,but little compared with that of which we are ignorant.