“I did not consider him to be any kind of a genius. I considered him deeply lacking in the area that mattered most in life. Star quality.”

Book Three, Chapter XXI.
Democracy in America, Volume II (1840), Book Three

Source: Safe Haven

Source: Catch Me If You Can: The True Story of a Real Fake

The Great Philosophers (1962)
Context: I approach the presentation of Kierkegaard with some trepidation. Next to Nietzsche, or rather, prior to Nietzsche, I consider him to be the most important thinker of our post-Kantian age. With Goethe and Hegel, an epoch had reached its conclusion, and our prevalent way of thinking — that is, the positivistic, natural-scientific one — cannot really be considered as philosophy.

Speaking at a Senate Appropriations hearing https://www.appropriations.senate.gov/hearings/review-of-the-us-department-of-the-interior-budget-request-for-fy2018 (21 June 2017)

1820s, Signs of the Times (1829)

"Academe and I" (May 1972), in The Tragedy of the Moon (1973), p. 224
General sources

Draft of undelivered speech (1948); published in the magazine Bungeishunju as quoted in the Sydney Morning Herald (11 June 2003).

UTI interview (2004)