Atheism definition

I saw a new, concise definition of Atheism.

Atheism is not the absence of belief, it's the freedom to believe in what is true.

No matter what any scripture says, I can believe that evolution is how we came to be, that we live in a 13.7 billion year old universe, that women are equal to men, that it is ok to be gay, that meaningful life does not begin at conception, and many other things that can be shown to exist or be true.  It means that our morality is of our own doing and responsibility.  Purpose and meaning in life is what we make of it for ourselves and again we are responsible for it.