That's a good quote, about God writing the law in our hearts.

You may be interested in exploring St Thomas Aquinas and https://en.m.wikipedia.org/wiki/Principle_of_double_effect and even https://en.m.wikipedia.org/wiki/Virtue_ethics

Christianity actually has an enormous amount of discussion and analysis by brilliant minds on all these issues. But our generations were never taught any old knowledge/wisdom.

One of my goals is to go through the books of the Great Conversation.