He had a mind so fine that no idea could violate it.

The line is a sharply ironic epigram: a “mind so fine” suggests refinement, sensitivity, and discrimination, yet the punchline—“no idea could violate it”—implies the opposite of intellectual openness. Eliot is mocking a kind of fastidious intelligence that is so delicate, so protective of its own poise and taste, that it refuses the rough intrusion of real ideas. The word “violate” intensifies the satire, casting ideas as something invasive and disruptive—precisely what genuine thinking often is. Read this way, the sentence criticizes sterile aestheticism and the cultivation of intellect as a social pose rather than as a willingness to be changed by thought.