“You can easily judge the character of a man by how he treats those who can do nothing for him.”—Malcolm S. Forbes.
http://quoteinvestigator.com/2011/10/28/judge-character/

 'The true test of a man's character is what he does when no one is watching.' — John Wooden 
www.goodreads.com/quotes/203719-the-true-test-of-a-man-s-character-is-what-he