Be what you are.
We are our worst critics; we tend to judge ourselves too harshly—or avoid getting a fair evaluation.
The former can lead us to killing ourselves. If you have a tendency to do this, remember that you are better than you think you are.
The latter may be a bit more problematic. People who do this live in a fantasy world, and don’t embrace what they actually are. Probably we should let them alone—until they notice that they need to live in a real world.