“The more you try to be interested in other people, the more you find out about yourself.”

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)

Jim White (February 17, 1994) "POP / Hi, I'm Dave - lovely to see you: Last week, David Lee Roth went to Wembley to promote his new album - not at the stadium but at the distribution factory, saying hello to the packers and the pressers, 'making friends at the retail level'. Jim White jumped into the limo to discover where people fit in with 'this rock'n'roll thing'" The Independent, p. 27.

1990s, Schafer interview (1995)
Context: Fighting wars is not so much about killing people as it is about finding things out. The more you know, the more likely you are to win a battle. Take the AEGIS system in the navy. It's a radar computer system for air-battle management. What it does is give the commander an extra 15 minutes to decide what he's going to do to fight a battle, and those 15 minutes are decisively important.

Vanderbilt Commencement Address (2011)

Books, Tricks of the Mind (2006)

Source: If You Could See Me Now

Book I, Chapter 5, "We Have Cause to Be Uneasy"
Mere Christianity (1952)
Context: We have two bits of evidence about the Somebody. One is the universe He has made. If we used that as our only clue, I think we should have to conclude that He was a great artist (for the universe is a very beautiful place), but also that He is quite merciless and no friend to man (for the universe is a very dangerous and terrifying place.)... The other bit of evidence is that Moral Law which He has put in our minds. And this is a better bit of evidence than the other, because it is inside information. You find out more about God from the Moral Law than from the universe in general just as you find out more about a man by listening to his conversation than by looking at a house he has built.