The first erroneous assumption is that quality means goodness, or luxury, or shininess, or weight.

The deep, personal material of the latter half of your life is your childhood.

"Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful."

The most dangerous phrase in business is: 'We've always done it this way.'

在数学领域，每个问题都是发现新事物的机会。