"The love for all living creatures is the most noble attribute of man."
"...I believe there exists, & I feel within me, an instinct for the truth, or knowledge or discovery, of something of the same nature as the instinct of virtue, & that our having such an instinct is reason enough for scientific researches without any practical results ever ensuing from them."
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Source: Charles Darwin, Frederick Burkhardt, Sydney Smith (1985). “The Correspondence of Charles Darwin: 1847-1850”, p.128, Cambridge University Press
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