A Few quotes on meaning of life

I search for a few quotes on life's meaning and have found these good ones :
When it is dark enough, you can see the stars.
When it's all over, it's not who you were. It's whether you made a difference.
When we are motivated by goals that have deep meaning, by dreams that need completion, by pure love that needs expressing -- then we truly live life.
When you were born, you cried and the world rejoiced. Live your life so that when you die, the world cries and you rejoice.