Something that I find profound when talking to athiests is they cannot explain the Mind apart from the Brain. God spoke the Creation into existence. When we show love to the people who are dear to us, our emotions and thoughts of love for them turn the invisible into the visible, physical dimension, such as a rub on the back, or a hug. The Mind and the invisible element of our Spirit and Soul are the realist things about us. There is no bio-chemical physical process or Mind/Emotion molecules. Frank Turek says it best! "I don't have enough faith to be an Atheist"! It is one of the reasons I believe in our Creator.