"Where ignorance is bliss, tis folly to be wise" is a quotation by-

- This line quoted line from Thomas Gray’s poem, Ode on a Distant Prospect at Eton College.

Thomas Gray:
- He was an English poet.
- Mostly Famous for his Elegies.

Notable works:
- Elegy Written in a Country Churchyard (1751),
- Alexander's Feast,
- Ode to Adversity,
- The Bard.

Source: An ABC OF English Literature - Dr. M. Mofizar Rahman