He that understandeth quickly, listeneth patiently, pursueth his objects with judgment and not from desire and spendeth not his breath on the affairs of others without being asked, is said to possess the foremost mark of wisdom. They that do not strive for objects that are unattainable, that do not grieve for what is lost and gone, that do not suffer their minds to be clouded amid calamities, are regarded to possess intellects endued with wisdom.

In plain words: A wise person understands quickly, listens patiently, acts with good judgment instead of desire, and does not give opinions on others' business unless asked. They don't chase impossible things, don't grieve over what is lost, and stay clear-headed in disasters.