What is the explanation of humanism?

"Humanism is a philosophy based on human values, human knowledge of the natural universe, and human endeavor. It is based on the belief that we are responsible for our own destiny. Humanists reject any notion of the supernatural, and therefore reject the idea that our lives are presided over by any supernatural force or "god", and that our ethics and standards of behavior are "handed down" to us by "divine authority".

The rejection of the supernatural also forces us to question the idea that our existence serves some predetermined "purpose". It is the view of Humanists that we create our own purpose and that we must use our intelligence, our knowledge, and our compassion to build good lives for ourselves and for future generations"

- http://home.vicnet.net.au/~humanist/aboutus/aboutus.html

Got this from the website above, where there is also more info