Whether or not theistic or any spiritualistic metaphysics is true, we can aspire, seek the truth, pursue the good, love our neighbors, be kind, do no harm, respect, revere, cherish, be grateful . . . honor our commitments, follow our consciences . . . guard our thoughts, weaken the ego, live by a code, deny the self, seek the higher, thirst after justice and righteousness . . . .
Why then do we need doctrine? This is a question we need to ask.