"Be who you are and say what you feel, because those who mind don't matter, and those who matter don't mind." 
— Dr. Seuss
"Be the change that you wish to see in the world." 
— Mohandas K. Gandhi
"The incurable sufferer is given very little opportunity to be proud of his suffering and to consider it ennobling rather than degrading" so that "he is not only unhappy, but also ashamed of being unhappy." 
— Viktor Emil Frankl
"I finally understood what true love meant...love meant that you care for another person's happiness more than your own, no matter how painful the choices you face might be." 
— Nicholas Sparks (Dear John)
You've gotta dance like there's nobody watching,
Love like you'll never be hurt,
Sing like there's nobody listening,
And live like it's heaven on earth.
— William W. Purkey