The difference between Morality and Holiness
Morality is principally a negative concept in that it almost always defines itself by what refrains from doing, more often than not its preoccupation is with externals.
Holiness is a much more positive concept and like its related term it is holistic. It too embraces the externals but doesn’t stop there, it is far more penetrating and comprehensive.
Holiness affects the heart, the mind, the emotions, the will, motivations, the conscience; holiness affects the totality of a person–what he does, where he goes, how he feels, what he thinks.
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— adapted from Dr Art Azurdia