Thinking small is a self-fulfilling prophecy

While I'm reading Amazon Leadership principles

I was feeling tired these days. It demands me a lot energy to hold both of work and study. I work as a part time job while taking two classes to get my university diploma. I just bear stuff around me, and feel like lost about what's going on.

I read the famous Amazon Leadership Principles. Some words hit me. "Thinking small is a self-fullfilling prophecy". Keep thinking big even if i am not doing my best like that. Can one idividual think big? Could that one be me?

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