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Mathematics is not just a human invention; it has a deep reality that exists independently of us.
数学不仅仅是人类的发明;它具有一种独立于我们而存在的深刻现实。
Don't walk behind me; I may not lead. Don't walk in front of me; I may not follow. Just walk beside me and be my friend.
Identify your problems, but give your power and energy to solutions.
"Biography is the most intimate form of history."