Socrates has ever said：

 ” The secret of happiness is not found in seeking more, but in developing the capacity to enjoy less. ”

Why？

We can get the answer from young children.

Young children are laughing and enjoying themselves at most of time.

They are in their totally natural state, and there is nothing tangible chaining them down, then they are happy.

Therefore, happiness is ― “having freedom.”

( the freedom of the body and the mind)