(noun) Error, mistake.
"Bad men are full of repentance."
"If a man talks bad about all women, it usually means he was burned by one woman."
"It is better to offer no excuse than a bad one."
"The truth is that everyone is bored, and devotes himself to cultivating habits."
"No wealth can ever make a bad man at peace with himself."
"By all means marry; if you get a good wife, you’ll become happy; if you get a bad one, you’ll become a philosopher."
"To express oneself badly is not only faulty as far as the language goes, but does some harm to the soul."
"It is absurd to divide people into good and bad. People are either charming or tedious."
"It takes many good deeds to build a good reputation, and only one bad one to lose it."
"History, in general, only informs us what bad government is."
"When you want wisdom and insight as badly as you want to breathe, it is then you shall have it."
"Those who look for the bad in people will surely find it."