Didn't you just love Katharine Hepburn?!  Sure she was a great actress, but Katharine Hepburn, the person, was much more honest, exciting and real.
Hepburn was known for her straightforward sassy tongue and jaw-dropping comments, one of which is about character.  She said to keep your character intact, you can't stoop to the character of others.  It makes it easier for you to stoop again.  She couldn't have been more right.