"Morality is not the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness."

"In law a man is guilty when he violates the rights of others. In ethics he is guilty if he only thinks of doing so."

immanuel kant

Kant's influence shows most in the first amendment. Kant was an avid believer in freedom of speech and freedom of religion, and so it is likely the writers got some ideas from him.