I think you have it backwards: Atheism is saying "I don't know." Agnosticism is saying "I don't think it's possible to know." Most religions are saying "I do

I think you have it backwards: Atheism is saying "I don't know." Agnosticism is saying "I don't think it's possible to know." Most religions are saying "I do know - it written in this book." Being an atheist does not preclude you from searching for answers, it just means admitting that we haven't found them yet. Agnosticism and religion are excuses to either pretend we can't know, or that we already know.