The phrase comes from a Thomas Grey poem entitled 'Ode on a distance prospect of Eton College' dated 1742

The quote "Where ignorance is bliss, 'tis folly to be wise" is from the poem "Ode on a Distant Prospect of Eton College" by Thomas Gray, an English poet from the 18th century. The line suggests that sometimes knowing too much can bring unhappiness, while ignorance can be preferable.

This phrase suggests that sometimes it's better to remain ignorant of certain information or truths because being aware of them could lead to unhappiness or distress. In other words, ignorance can sometimes bring contentment whereas knowledge can bring burden.

This is a quotation from an English poet called Thomas Gray born December 26 1716 and died 30 June 1771 from the poem

Ode on a Distant Prospect of Eton College

"Yet ah! why should they know their fate?

Since sorrow never comes too late,

And happiness too swiftly flies.

Thought would destroy their paradise.

No more; where ignorance is bliss,

'Tis folly to be wise."

1. "Ignorance is not bliss; it is oblivion." - Philip Wylie
2. "Ignorance is not innocence but sin." - Robert Browning
3. "Ignorance is not bliss; it is the ultimate curse of humanity." - Harlan Ellison