Ask most people about what they want for their children and it is 'to be happy'... is our sole purpose in this world to be happy? I think happiness is so important as with happiness, we are more open, productive, warm, friendly, inquisitive, creative, etc, etc and as such can do so much more with our lives to help make the world a better place in general...
And, what do you make of the earth being the centre of the universe and the rest of the universe revolving around us? What does that mean about the meaning of our life??!