The closing narration of The Twilight Zone, episode 153: The Brain Center at Whipple's.
"There are many bromides applicable here: 'too much of a good thing', 'tiger by the tail', 'as you sow so shall you reap'. The point is that, too often, Man becomes clever instead of becoming wise; he becomes inventive and not thoughtful; and sometimes, as in the case of Mr. Whipple, he can create himself right out of existence. As in tonight's tale of oddness and obsolescence, in the Twilight Zone."
The Brain Center at Whipple's - Wikipedia
