Atheists that say empirical evidence is why there is no God, maybe stop and reassess the argument. By that reasoning, there is a lack of empirical evidence saying there isn't a God. Using material reasoning to prove the immaterial is a step in the wrong direction.

Just because there isn't a sense experience to the knowledge, doesn't mean its untrue. We use Maths and/or the results of Maths everyday, yet we cannot observe a perfect right triangle in nature.

I'm not too well versed in Apologetics but the 'Transcendental Argument for God' in Orthodox Theology appears to be the best line of thinking for an existence of God.