"Nice is about what the other person is thinking and feeling–it’s their perception of the situation. Kind is about what you choose to do and why. When you want to be nice it’s because you want to please the other person; you want everyone to be happy. When you want to be kind it’s because you want to do what is right regardless of how other people feel about it. Nice is permissive. Kind is Grace By Design.
"If I want to be nice to my children I will give them what they want, not do what is needed, seek to please them and hope they like me. If I want to be kind to my children I will give them blessings, do what they need, seek to teach them and hope they learn. Nice manipulates. Kindness trains." [source: http://aolff.com/?page_id=77]