Bad things do happen. How you respond to them defines your character and the quality of your life. You can choose to sit in perpetual sadness, immobilized by the gravity of your loss, or you can choose to rise from the pain and treasure the most precious gift you have - life itself. 
-Walter Anderson

No one will see your struggles. No one will feel your pain and sorrow. But they all will see your mistakes.
-Unknown 

The loneliest moment in someone's life is when they are watching their whole world fall apart, and all they can do is stare blankly.
-Unknown

Be miserable. Or motivate yourself. Whatever has to be done, it's your choice. 
-Wayne Dyer

Act as if what you do makes a difference. It does.
-William James