…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.
Polarity means that the extreme opposites are actually the different degrees of the same thing. Take temperature for an example – heat and cold aren’t distinct entities or phenomenon but the same thing. Their only difference lies in the matter of degree.
This same principle can also be found on the mental plane. Love and hate; fear and courage; greed and compassion are all but the varying degrees of the same thing. The difference between them gets determined by the law of vibration. Some emotions vibrate on a higher level whereas others on a lower.