“Evil is easy to fight. Lack of wisdom… that is very hard indeed.”
Source: The Titan's Curse
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Rick Riordan 1402
American writer 1964Related quotes

other version: Hard training - easy combat; easy training - hard combat.
Philip Longworth: The Art of Victory, New York, 1965, cited in af.mil http://www.airpower.maxwell.af.mil/airchronicles/aureview/1986/nov-dec/menning.html.

“It's hard to admit but it's easy to tell
That evil is alive and well.”
"Evil Is Alive And Well"
Seeing Things (2008)
Context: When midnight's done, and the day won't start,
And all I ever gave you was a broken heart,
It's hard to admit but it's easy to tell
That evil is alive and well.

De Potentia (On Power) q. 3, art. 6, ad 4

“Men that love wisdom must be acquainted with very many things indeed.”
As quoted Clement of Alexandria, Stromata, V, 140, 6 (Fragment 35)

Nem a juventude sabe o que pode nem a velhice pode o que sabe.
Source: The Cave (2000), p. 4 (Vintage 2003)
Source: The Chronicles of Prydain (1964–1968), Book II: The Black Cauldron (1965), Chapter 20

“Wisdom comes from experience. Experience is often a result of lack of wisdom.”