“Certain virtues are natural, arising spontaneously from our human nature. Thus humility, kindness, modesty, generosity, mercy, and patience are often born in our hearts without any training or effort.”
Albertus Magnus
Thomas Aquinas is credited as one of the greatest proponents of natural law. During his time in Cologne he was taught by Albertus Magnus. Magnus used the teachings of Aristotle in his mentorship of Thomas Aquinas.