Other people's opinion

Schopenhauer said, "A man of correct insight among those who are duped and deluded resembles one whose watch is right while all the clocks in the town give the wrong time. He alone knows the correct time, but of what use is this to him? The whole world is guided by the clocks that show the wrong time; even those are so guided who know that his watch alone states the correct time." Take time to savor the most important part: "But of what use is this to him?" "Even those are so guided who know that his watch alone states the correct time." The thing that only you validate (truth, your value, or whatever) is useful only to the extent of how much you play life as a single-player game