Translated from the Pali by Thanissaro Bhikkhu.
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"Monks, a fool is characterized by his/her actions. A wise person is characterized by his/her actions. It is through the activities of one's life that one's discernment shines.
"A person endowed with three things is to be recognized as a fool. Which three? Bodily misconduct, verbal misconduct, mental misconduct. A person endowed with these three things is to be recognized as a fool.
"A person endowed with three things is to be recognized as a wise person. Which three? Good bodily conduct, good verbal conduct, good mental conduct. A person endowed with these three things is to be recognized as a wise person.
"Thus, monks, you should train yourselves: 'We will avoid the three things that, endowed with which, one is to be recognized as a fool. We will undertake & maintain the three things that, endowed with which, one is to be recognized as a wise person.' That's how you should train yourselves."
See also: AN X.176.