Don't spend too much time dwelling on other people's opinions, especially those from ancient times, when people's understanding was limited. The pursuit of truth is always a solitary one. As you learn more, your mind changes, gradually rising above the social average. You can no longer joke and chat easily with the people around you. If you still can, it means you're at the same level of understanding. To see whether your mind has changed, ask yourself: Am I the same person I was before? If you are, then you haven't changed during this time. If you aren't, then you have.