Philosophy.  Is it not different for each person?  You all must filter your ideas through your own set of beliefs.  Each culture shares a similar philosophy, yet even within a culture, men’s ideas differ.  Have you not heard of the Perennial Philosophy?  There is only one Truth, and this Truth bypasses the mind.  It dwells within the heart, which has its own moral code, its own ethics, its own internal guidance.  Have your philosophies.  Debate them but worry not whether you are right or wrong.  The heart will guide you.  Follow its unerring guidance and live a life worth living.