Agnosticism: view that God’s existence is unprovable - the belief that it is impossible to know whether or not God exists.
Atheism: unbelief in God or deities - disbelief in the existence of God or deities.
I am an atheist. My senses and my rationale tell me that there is no reason to believe in god, therefore I do not. According to the above definition of agnosticism - there is the possibility of a god although it would still be based on faith. Of course if I saw actual material evidence supporting the existence of a being higher than man with omnipotence and omniscience, I would of course denounce my atheistic views and become a Jew/Christian/Muslim/etc. But, I do not ascribe to the opinion that nothing is knowable and that faith is a valid reason to believe. If God exists, he will not be the god of faith.
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