“No tool is more beneficial than intelligence. No enemy is more harmful than ignorance.”

— Al-Shaykh Al-Mufid

http://encarta.msn.com/quote_561557126/Intelligence_No_tool_is_more_beneficial_than.html
The Book of Guidance into the Lives of the Twelve Imams, 1981, "The Life of the Commander of the Faithful" (I. K. A. Howard (tr.)).

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Al-Shaykh Al-Mufid 1

scholar 948–1022

Sheri S. Tepper (1929–2016) American fiction writer

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“No human is more intelligent than the other…just more adept at certain areas of intelligence.”

Siddharth Katragadda (1972) Indian writer

page 7
Dark Rooms (2002)

“Who else is the enemy of Nature but he who mistakes himself for more intelligent than Nature, though it is the highest school for all of us?”

Paracelsus (1493–1541) Swiss physician and alchemist

Paracelsus - Doctor of our Time (1992)

“Fashions have done more harm than revolutions.”

Victor Hugo (1802–1885) French poet, novelist, and dramatist

“On balance Mao did more good than harm.”

Diane Abbott (1953) British Labour Party politician

On BBC One's This Week during a debate over who was the history's worst dictator. http://www.huffingtonpost.co.uk/2015/11/27/diane-abbott-said-on-balance-mao-did-more-good-than-harm_n_8660910.html (27/11/2015)
2010s, 2015