The Art of Creative Writing

In short: he’s good and evil at the same time. It depends on what inner or outside contradiction activates him to expose himself.

This is why a writer must know when a character is one-, two- or three-dimensional.
Men are essentially the same. The difference is only in degrees. All this sounds simple enough, but the problem is how to capture this chameleon-like creature in repose long enough to draw his true image.