It's a 1D song, but it's also the truth. Just like your work, you will never fully appreciate your own beauty. Others most definitely will however the harsh reality is that not everyone will and there is nothing you can do about it. Luckily though, It doesn't actually matter.
If you've seen the movie Labyrinth, you'll know the scene where Sarah is distracted by the masked ball in her snow globe. and almost forgets what she was trying to achieve in the first place by rescuing her brother.
This is just like worrying about what other people think, we can easily become distracted by it, but you can't let it take you away from what you know you should be doing. These people don't matter. Your contribution to the world, on the other hand, truly does.
The Firelight Creative 🔥