Can you be a good person with bad morals?

What is the relation between moral and spiritual development? 

There is a distinction in degree, not in kind—what the moral is to the material life, the spiritual is to the inner life.

Can one be morally bad and spiritually good?

No—that is in a manner impossible, for you must possess your lower nature before you can hope to possess your higher. 

As the greater must contain the less. First that which is natural after that which is spiritual.

—Insight in Spirit