The Principle of Polarity
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 (The Kybalion). The best example I can think of to explain this principle is the flow of electrical current, which requires equal and opposite charges, positive and negative. Both charges are needed for an effective flow of current. Remember the principle…