Be wise, but not too wise.

The source

"Be wise, but not too wise." This Norse (Hávamál) is recorded in Hávamál 54. Translated from the original Old Norse by Spartan Surfers.

"Meðalsnotr skyli manna hverr; æva til snotr sé"

Original Old Norse, Hávamál 54. Old Norse: Hávamál, normalized text (Guðni Jónsson) via heimskringla.no; meaning checked against Bellows 1923.

Who said it

Proverbs of the world (Every age). Sayings from the Latin, Greek, Norse, Japanese, Chinese and more, each traced to an old source in its own language.

Questions

Who said "Be wise, but not too wise."?

Norse (Hávamál). Source: Hávamál 54.

What is the original Old Norse?

Meðalsnotr skyli manna hverr; æva til snotr sé. Translated from the original Old Norse by Spartan Surfers.