“Intelligent people tend to have less friends than the average person. The smarter you are the more selective you become.”
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Nikola Tesla 125
Serbian American inventor 1856–1943Related quotes

“As more people become more intelligent they care less for preachers and more for teachers.”

In most cases they are utterly unable to answer that question honestly.
A comment http://lwn.net/Articles/447204/ at LWN.net in 2011.

“Hay fever suffers tend to be above average in intelligence,…”
Source: The Invisible Bankers, Everything The Insurance Industry Never Wanted You To Know (1982), Chapter 12, They Bet Your Life, p. 225.

Rich Dad Poor Dad: What the Rich Teach Their Kids About Money-That the Poor and the Middle Class Do Not!

“Always be smarter than the people who hire you.”
Variant: You can make more friends in two months by being interested in them, than in two years by making them interested in you.
Source: How to Win Friends and Influence People (1936), p. 52 (in 1998 edition)

“Life is tough when you are always talking to people smarter than you.”
Source: The 3 Mistakes of My Life (2008), P. 5