Human body is the best God can do?

[fr0d0]

The human body is still in the process of evolving.

And also continually adapting to its environment. Evolving needn't imply 'perfecting'. Just sayin'.

I agree that the whole essence of faith is an absence of evidence, but surely the existence of anything (it doesn't have to be God) should be subject to the normal procedures we place on everything else. That is to say, empirical evidence.

The requirement of empirical evidence in this case would be illogical. You can't demand that everything follows a common rule.