When you were younger, you cared about the whole world, and at some point somebody said you had to pick an issue, you had to boil your love down to an issue.
若い頃は世界全体の事を気にかけませんでした？ 時には、誰かに− 「問題は一つにしぼりなさい」 助言された事もあるでしょう。