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A book can be a friend, a teacher, and a doorway to another world.

The stock market is a device for transferring money from the impatient to the patient.

"Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them."

You must be the change you wish to see in the world.

快樂不是因為擁有的多，而是計較的少。