"As a vessel is known by the sound, whether it be cracked or not; so men are proved, by their speeches, whether they be wise or foolish"

This quote by Demosthenes is an allegory that contrasts a vessel to a person. Just as a vessel can be judged by the noise it makes, a person can be evaluated by their words. The noise of a vessel can show whether it is broken or otherwise, and in a similar way, a person's words can show whether they are sensible or foolish. This metaphor is a tip that our words have power as well as can be used to disclose our real character.

The quote additionally works as a cautioning to be conscious of words we make use of. We must think before we speak and know the impact our words can have. Our words can be made use of to build up or tear down, to motivate or dissuade, and to bring tranquility or produce dispute. Consequently, it is necessary to select our words very carefully and also use them intelligently.

In conclusion, this quote by Demosthenes is a pointer that our words can be made use of to disclose our true character and that we should be mindful of the words we use. Our words have power and can be utilized to develop or tear down, so it is essential to choose them wisely.