Maybe philosophy - I love talking about ideas. Or maybe art history. I was thinking about psychology, then I got really afraid because everybody says it's terribly boring.
“I know that military alliances and armament have been the reliance for peace for centuries, but they do not produce peace; and when war comes, as it inevitably does under such conditions, these armaments and alliances but intensify and broaden the conflict.”
“It is the people who can do nothing who find nothing to do, and the secret to happiness in this world is not only to be useful, but to be forever elevating one's uses.”