Final answer:
Only God can make the impure pure, according to Christian beliefs highlighted in the question. This concept relates to the nature of sin, morality, and God's role in defining what is considered 'good.' Philosophers like Leibniz have also contextualized the presence of evil as part of a larger divine plan for the best possible world.
Step-by-step explanation:
According to the Christian belief referenced in the question, it is often believed that only God can make the impure pure. This is grounded in the theological view that the human mind is intrinsically sinful and in a state of enmity against God's laws, as stated in the biblical passage 'The sinful mind is hostile to God. It does not submit to God's law, nor can it do so'. In the context of these beliefs, the transformation of purity can only occur through divine intervention, notably through the process of repentance and the acceptance of God's grace.
This perspective raises philosophical questions about the nature of morality and its dependence on God's will. It suggests that what is considered 'good' is inherently tied to God's command, and that without God's guidance, humanity may not have a clear or independent measure of morality.
The implication is that understanding and adhering to what is right and wrong is intertwined with God's influence, challenging the notion of an innate moral compass independent of divine prescription.
Additionally, significant philosophical and theological discussions, such as those by Leibniz, explore the relationship between God's omniscience, the existence of evil, and the concept of the best possible world. These discussions often defend the idea that the presence of evil is necessary for the greater good and that humans, with their limited perspective, cannot fully comprehend the divine reasoning that asserts the world is in its optimal state despite the presence of evil.