Conversation so far:
when does a value become a moral value
Values are things that have an intrinsic worth to the possessor but moral values protect life and are respectful of the dual life value of self and others.
is there a supreme morality according to philosophers
Immanuel Kant makes explicit that morality must be based on a supreme moral principle

Question: how can the principle be discovered
Self-contained rewrite: according to kant, how can a supreme moral principle be discovered