I can confidently say that the person who recognizes, realizes and integrates the darkness in their heart is happier than anybody who believes they are entirely light. Consciousness is infinite. Any attributes you define as part of your self cast a shadow of "not self" that you will define as "other." There is no other, only one true infinite and undifferentiated consciousness cleaved by your will into as many pieces as you need in order to maintain your ego delusions.