That man who knoweth the nature of all creatures (viz., that everything is subject to destruction), who is cognisant also of the connections of all acts, and who is proficient in the knowledge of the means that men may resort to (for attaining their objects), is reckoned as wise. He who speaketh boldly, can converse on various subjects, knoweth the science of argumentation, possesseth genius, and can interpret the meaning of what is writ in books, is reckoned as wise.

In plain words: A wise person knows that every living thing will one day pass away, understands how actions are linked to their results, and knows how people reach their goals. They speak boldly, can talk on many subjects, know how to argue well, and can explain what books mean.