Jason, in his reply, cited Isaac Asimov as a philosophical influence. Here, the great Asimov, in his thoughts on Humanism vs Spiritualism summarizes my beliefs in a much more eloquent manner than I could ever hope to achieve:

I have never, not for one moment, been tempted toward religion of any kind. The fact is that I feel no spiritual void. I have my philosophy of life, which does not include any aspect of the supernatural and which I find totally satisfying. I am, in short, a rationalist and believe only that which reason tells me is so.

I’ve never been particularly careful about what label I placed on my beliefs. I believe in the scientific method and the rule of reason as a way of understanding the natural Universe. I don’t believe in the existence of entities that cannot be reached by such a method and such a rule and that are therefore “supernatural.” I certainly don’t believe in the mythologies of our society, in Heaven and Hell, in God and angels, in Satan and demons. I’ve thought of myself as an “atheist,” but that simply described what I didn’t believe in, not what I did.

Gradually, though, I became aware that there was a movement called “humanism,” which used that name because, to put it most simply, Humanists believe that human beings produced the progressive advance of human society and also the ills that plague it. They believe that if the ills are to be alleviated, it is humanity that will have to do the job. They disbelieve in the influence of the supernatural on either the good or the bad of society, on either its ills or the alleviation of those ills.

Have I told you that I prefer “rationalism” to “atheism”? The word “atheist,” meaning “no God,” is negative and defeatist. It says what you don’t believe and puts you in an eternal position of defense. “Rationalism” on the other hand states what you DO believe; that, that which can be understood in the light of reason. The question of God and other mystical objects-of-faith are outside reason and therefore play no part in rationalism and you don’t have to waste your time in either attacking or defending that which you rule out of your philosophy altogether.

There is nothing frightening about an eternal dreamless sleep. Surely it is better than eternal torment in Hell and eternal boredom in Heaven. And what if I’m mistaken? The question was asked of Bertrand Russell, the famous mathematician, philosopher, and outspoken atheist. “What if you died,” he was asked, “and found yourself face to face with God? What then?”And the doughty old champion said, “I would say, ‘Lord, you should have given us more evidence.'”