In all due respect can an atheist have peace?
Um, how can an atheist not have peace? Maybe I am not understanding the question, but what makes peace and atheism incompatible?
Is there no higher power then science?
Of course there are! There are the laws of physics that apply to our universe, the laws of the quantum world, of string theory, etc that we have not even touched on yet, not to mention the laws of thought which are inescapable.
Do you really sleep well at night content with no God?
Hmmm, I don't sleep well at night due to chronic pain, a terrible mattress, stress, video games, movies, and intense work for class before bed, depression issues... Nothing related to God though. Again, I am not sure I understand the question. How does a good night's rest relate to God? If anything, I sleep poorly because of the way God made my brain work.
What happens after death?
Well you are either cremated or buried, though there are many ways to mix it up. Your body rots in the ground, feeds worms and such, returns to the soil and to the life cycle as a whole. It is actually quite poetic. We return to where we came from.
Where are your loved ones?
Uh, well I think my grandparents are at home. Same with my mother and aunt. Friends too probably considering all of us have classes in the morning. As for dead loved ones, my dad's corpse (or what is left of it) is about two miles away plus 12 feet under ground. It would be safer to say he exists in pictures, memories, stories, and the blood of his relatives. Again, also relatively poetic.
Is earthly life all you strive for and death is the end of you?
What do you mean by "earthly life"? Right now I am striving for a Bachelors in biological anthropology, as well as completing a more successful play through of Mass Effect 3 on Xbox 360, trying to write a novel, looking for a damn job... Again, not sure how it relates to God. Of course death is the end of "me", how could "I" exist without awareness and my mental processes? "I" am the miraculous result of trillions of cells and millions of years of evolution working together against unfathomable odds to create the exact person I am today. Much more beautiful than walking on water and turning water to wine. And when I die I will "live on" in memories, pictures, stories, and blood.
Are you so sure, really?
Actually yes, I am quite sure. I do believe there is something fundamental beyond our full understanding, but nothing supports the existence of anything I would call God. There is no reason to believe that not everything has a natural cause, that whatever is fundamental is not just as mechanical and deterministic as the aspects of reality we are familiar with. There is no need for a conscious creator and nothing supporting that one exists. There is not one single case that suggests interaction from a divine being, nothing that needs to be explained by the supernatural, and even if there is something we do not fully understand, it is only logical to believe that there is an explanation besides God, we just do not know it. There is absolutely nothing suggesting a deity exists.
What if...just What if your wrong? What are the consequences of your denial?
Logically nothing. There is no evidence that any deity exists, and apparently God is beyond logic and understanding. So, there is no responsibility on me to accept God's existence. If God held it against me that it created me in a way that I could not logically believe in it or understand it, as well as creating me in such a way that is bound to fact, evidence, and logic, then screw it, I wouldn't want anything to do with such a God. If God exists, the ability to reason (which sets humans apart from other animals) is God's greatest gift. Since I see no logical reason to believe in God, I think if one exists it would respect my logical atheism more than a believers blind, fideistic faith.