"Sometimes the hardest thing in life is to know which bridge to cross and which to burn."

A philosophical problem has the form: 'I don't know my way about.'

As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.

The only way to overcome obstacles is to face them head-on.

仅仅因为你制定了一个好计划，并不意味着事情会按计划发展。