Here’s an interesting quote from William Walker Atkinson:

“And so it is on the Mental Plane. “Love and Hate” are generally regarded as being things diametrically opposed to each other; entirely different; unreconcilable. But we apply the Principle of Polarity; we find that there is no such thing as Absolute Love or Absolute Hate, as distinguished from each other.

The two are merely terms applied to the two poles of the same thing. Beginning at any point of the scale we find “more love,” or “less hate,” as we ascend the scale; and “more hate” or “less love” as we descend—this being true no matter from what point, high or low, we may start. There are degrees of Love and Hate, and there is a middle point where “Like and Dislike” become so faint that it is difficult to distinguish between them. Courage and Fear come under the same rule.

The Pairs of Opposites exist everywhere. Where you find one thing you find its opposite— the two poles.

And it is this fact that enables the Hermetist to transmute one mental state into another, along the lines of Polarization. Things belonging to different classes cannot be transmuted into each other, but things of the same class may be changed, that is, may have their polarity changed.

Thus Love never becomes East or West, or Red or Violet—but it may and often does turn into Hate—and likewise Hate may be transformed into Love, by changing its polarity. Courage may be transmuted into Fear, and the reverse. Hard things may be rendered Soft. Dull things become Sharp. Hot things become Cold. And so on, the transmutation always being between things of the same kind of different degrees.

Take the case of a Fearful man. By raising his mental vibrations along the line of Fear-Courage, he can be filled with the highest degree of Courage and Fearlessness. And, likewise, the Slothful man may change himself into an Active, Energetic individual, simply by polarizing along the lines of the desired quality.”