You can tell what things are truly good from this test. When someone hears real goods mentioned — wisdom, self-control, justice, courage — they feel satisfied. The word 'good' fits perfectly. They don't need to hear more. But when people hear the things that most others call good, they keep listening for something else. They want more.
What those things are in themselves, which by the greatest part are esteemed good, thou mayest gather even from this. For if a man shall hear things mentioned as good, which are really good indeed, such as are prudence, temperance, justice, fortitude, after so much heard and conceived, he cannot endure to hear of any more, for the word good is properly spoken of them. But as for those which by the vulgar are esteemed good, if he shall hear them mentioned as good, he doth hearken for more.