Authors:

That which is evil is soon learned.

John Ray (1678). “A Collection of English Proverbs: Digested Into a Convenient Method for the Speedy Finding Any One Upon Occasion : with Short Annotations. : Whereunto are Added Local Proverbs with Their Explications, Old Proverbial Rhythmes, Less Known Or Exotick Proverbial Sentences, and Scottish Proverbs”, p.8
That which is evil is soon learned.