The principle of causality states that everything that comes into being is caused by virtue of something outside itself. However, the effect can not be greater than the cause. Let us apply this to human existence. If there is intelligence in the effect (humanity), there must be intelligence in the cause (because like produces like). But a universe ruled by blind chance has no intelligence. Therefore, there must be a cause of human intelligence that transcends the universe, a divine mind behind the physical universe.