Also, learn how to stick up for yourself, go after things you want, have some confidence, think positively, and interact productively with other people and you can do fine without having to be a jerk.
The quote, "An idle brain is the devil's workshop," comes from H.G. Bohn's "Handbook of Proverbs", published in 1855. Often, the word "brain" is substituted by the word "mind" and "workshop" is sometimes changed to "playground" in the modern daily use of the expression.
Also, learn how to stick up for yourself, go after things you want, have some confidence, think positively, and interact productively with other people and you can do fine without having to be a jerk.