Morality is real precisely because God is real. As our Creator, He is the transcendent authority—the law-giver who gets to tell us what we ‘ought’ or ‘ought not’ to do. It is because we are made by Him and are like Him that we know we cannot really treat morality as just an invention. It is because existence is more than just molecules that right and wrong are important. It is because we are made in the image of God the Creator that morality really is bigger than we are. Which means that God ultimately defines what is right and what is wrong.
At this point, the atheist is in dire straits. The first of God’s laws is to love Him with our whole being (Mark:12:30). Can we therefore be truly good without honouring God? No, because by refusing to honour our Maker we break the first and greatest of all the commandments.
Atheists need to face up to logic—ultimately, either nothing is immoral (because there is no God, and thus no such thing as morality) or atheism is itself immoral. There are no coherent alternatives.
—David Anderson (Missionary near Nairobi, Kenya, formerly a church planter in the UK).