Roald Dahl said this quote

I think probably kindness is my number one attribute in a human being. I'll put it before any of the things like courage or bravery or generosity or anything else.Brian Sibley: Or brains even?Oh gosh, yes, brains is one of the least. You can be a lovely person without brains, absolutely lovely. Kindness - that simple word. To be kind - it covers everything, to my mind.If you're kind that's it.