Nothing in the world is free - or so I thought.

I told Warrick that nothing in the world is free.  That someone, somewhere, has to pay for it.  Free samples are not free.  Someone has to pay for them, etc.  I don't remember what we were talking about exactly, but he disagreed.
"Friendship is free."  He said.
"No, you have to pay for it with kindness."
"But kindness is something that once you give away you still have it; so it's free.  No matter how much kindness you give, you still can have more kindness to give ."