Constant kindness can accomplish much. As the sun makes ice melt, kindness causes misunderstanding, mistrust and hostility to evaporate.
— Albert Schweitzer

The older you get the more you realize that kindness is synonymous with happiness.
— Lionel Barrymore

Charity does not require a large deed. It often takes little acts of kindness in the form of a warm smile or a kind word.
— Stephen Covey

Kindness makes a man attractive.
— Proverbs 19:22

It is a good idea to be ambitious, to have goals, to want to be good at what you want to do, but it is a terrible mistake to let drive and ambition get in the way of being a nice person who cares about other people and takes the trouble to treat them with kindness and decency. The point is not that they will then be nice to you. The point is that you will feel better about yourself.
— Robert Solow