There is no god. If there were, you could have straightforward conversations with him whenever you wanted (and thus you could ask him this question, instead of asking it here). And prayer has no confirmed effects other than natural psychological and biochemical effects (such as placebo and anxiety relief), which is equally accomplished by entirely godless meditation.
Is prayer just a way of centering oneself neurochemically (all maintained within the brain alone) or does prayer really connect one with "God"? How does one know if one is really communicating with "God"?
The Atheist Perspective
Can god make a rock so big he can't lift it?
Answers: Muslim, Atheist, Christian
Aren't Allah, Brahman and Yahweh just different names for the same God?
Answers: Atheist, Muslim, Christian
If our choices are predetermined, how are they real choices? And how are we accountable?
What do you think the worst aspect of your faith or worldview is?
How do fossils exist if the Earth is supposedly 6000 years old?
Atheist The God Delusion Richard Dawkins Atheist Sense and Goodness Without God: A Defense of Metaphysical Naturalism Richard Carrier Atheist Not the Impossible Faith Richard Carrier Atheist Hitler Homer Bible Christ: The Historical Papers of Richard Carrier 1995-2013 Richard Carrier Atheist Why I Am Not a Christian: Four Conclusive Reasons to Reject the Faith Richard Carrier Atheist Proving History: Bayes's Theorem and the Quest for the Historical Jesus Richard Carrier Atheist God Is Not Great: How Religion Poisons Everything Christopher Hitchens Atheist Atheism: A Philosophical Justification Michael Martin