In reading again through Francis Schaeffer’s great book “The God Who Is There”, I’ve been struck afresh with this thought:
Atheists have no true and consistent basis upon which to distinguish between right and wrong. Though they might argue tooth-and-nail to the contrary, the reality is that they cannot make truly reasonable decisions concerning that which is ethical or non-ethical. At best, a basis is found by mutual agreement for the betterment of society. But as soon as one society disagrees with another about what is ethical, an unavoidable contradiction emerges. Moreover, history has shown that a ‘survival of the species’ approach does not give society a sufficient base for determining that which is ethical and that which is not.
This in contrast to the reality of a theistic worldview: Ethics flow from the basis of God’s revealed law. God’s law, in turn flows from His unchanging, constituent being–the very bedrock of reality, truth and holiness.