The greatest discovery of any generation is that a human being can alter his life by altering his attitude.

在数学中，旅程往往比目的地更重要。

We can’t leave the problem-solving to the next generation. We have to do our part now.

The greatest happiness is to transform one's feelings into action.

为了成为一名好老师，教育者必须是一位心理学家。