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"知人者智，自知者明。胜人者有力，自胜者强。"
— 老子
1
"You have within you right now, everything you need to deal with whatever the world can throw at you."
— Brian Tracy
"You have within you right now, everything you need to deal with whatever the world can throw at you."
— Brian Tracy
"知人者智，自知者明。胜人者有力，自胜者强。"
— 老子
"己所不欲，勿施于人。"
— 孔子