This episode is about the Principle of Polarity which is principle number 4 of the seven hermetic principles.

The principle of Polarity states that:

"Everything is dual; everything has poles; everything

    has its pair of opposites; like and unlike are the same;

    opposites are identical in nature, but different in degree;

    extremes meet; all truths are but half-truths; all paradoxes

    may be reconciled."

Ok, I love this principle. It might be my favorite. The reason that I like this principle so much is because the concept is simple to understand, it makes a lot of sense and it provides even more information on how to perform mental transmutations