Who is the person who thought that some things could be proven with reason and faith with natural law of how the world could operate?

Erasmus placed a strong emphasis on the autonomy of human reason and the importance of moral precepts. As a Christian, he distinguished among three forms of law: laws of nature, thoroughly engraved in the minds of all men

Answer: Saint Thomas Aquinas

Explanation:

Aquinas sees reason and faith as two ways of knowing. "Reason" covers what we can know by experience and logic alone. From reason, we can know that there is a God and that there is only one God; these truths about God are accessible to anyone by experience and logic alone, apart from any special revelation from God.