“Instinct is untaught ability.”
Alexander Bain, The Senses and the Intellect (1855), p. 256; in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 397-98.
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Alexander Bain 7
Scottish philosopher and educationalist 1818–1903Related quotes

quoted by his brother-in-law Claude Terrasse, in 'Introduction' of Pierre Bonnard, John Rewald; MoMA - distribution Simon & Schuster, New York, 1918

“It's a fine thing to have ability, but the ability to discover ability in others is the true test.”

Hosts and Guests (1918), Harper's Monthly ( August 1919 http://books.google.com/books?id=H2Q2AQAAMAAJ&q=%22Mankind+is+divisible+into+two+great+classes+hosts+and+guests%22&pg=PA425#v=onepage)
And Even Now http://www.gutenberg.org/dirs/etext99/evnow10.txt (1920)

How we love to play with words that please our pride;
Our noble race's mean descent by false forged titles seek to hide! <p> For "gift divine" I bid you read the better work of higher brain,
From Instinct diff'ering in degree as golden mine from leaden vein.
The Kasîdah of Hâjî Abdû El-Yezdî (1870)

“The ability to suffer and the ability to love are one.”
Source: Lumina and New Lumina (1969), p. 45