But moral psychology does not have to tell the whole story. There is no reason why we cannot have moral psychology and moral philosophy: moral psychology to explain why moral progress is both possible and painfully slow, and moral philosophy to clarify what constitutes moral progress and to push us in the appropriate direction.
但道德心理学并不一定是故事的全部。没有理由认为我们不能同时拥有道德心理学和道德哲学：道德心理学用来解释为何道德进步既是可能的，过程又极为缓慢；而道德哲学可以澄清是什么构成了道德进步，并把我们引向正确的方向。