It is not fair to say such because empirical evidence does not define existence. The flaw in this type of logic is that it assumes that something does not exist if it is not scientifically proven. Following this way of thinking we would be led to believe that atoms did not exist until the 19th century, that the various species of plants and animals on earth did not exist until they were discovered or that the celestial bodies of the universe came into existence because they were seen with the Hubble telescope. You can't measure emotions or even life itself, so this logic would propose that these matters don't exist until experienced. This would be an absurd conclusion that is itself more incredulous than the claim you assert against the belief in God.