Some that are not specifically programming quotes but are applicable:
The fool wonders, the wise man asks.
— Benjamin Disraeli
As a general rule, the most successful man in life is the man who has the best information.
— Benjamin Disraeli
Plans are worthless, but planning is everything.
— Dwight D. Eisenhower
Education: that which reveals to the wise, and conceals from the stupid, the vast limits of their knowledge.
— Benjamin Disraeli
— Mark Twain
