"When I talk about love I'm thinking of unselfish love. Sex can be bought and sold just like anything else. But I think real love is about giving and not expecting anything in return."
- Bono, February 1983
The lyric "3:33 when the numbers fell off the clock face" from Unknown Caller is a reference to the Bible verse Jeremiah 33:3. Bono refers to it as "God's phone number".