From Rand -
"Important" - in its essential meaning, as distinguished from its more limited and superficial uses - is a metaphysical term. It pertains to that aspect of metaphysics which serves as a bridge between metaphysics and ethics: to a fundamental view of man's nature. That view involves the answers to such questions as whether the universe is knowable or not, whether man has the power of choice or not, whether he can achieve his goals in life or not. The answers to such questions are "metaphysical value-judgments", since they form the base of ethics.