What is the point of prayer? By praying to god you are trying to bring something to his/her/its attention, right? But if god is omnipotent why would he need things bought to his attention? He/she/it is all knowing and all seeing, so why are you wasting your time? He/she/it would already know, so don't bother saying you're praying for me. It's a hollow gesture.
Also, being all knowing, god would know the whole course of your life before you are born. He/she/it would know everything you do and say and think for infinity before you do. So how can you say that god has given us free will? In his/hers/its eyes, our life has already played out and we are just going through the motions. That's pretty friggin depressing. And if that's true, what is the point of this life? If god already knows how your life is going to play out before you even come into existence, then he also knows if you are worthy for heaven or if you should be damned to hell. Why delay the inevitable, then? Why wouldn't there just be an afterlife with no real life? This life would be completely pointless. Damn that's depressing. I guess it's a good thing I'm not religious.