"Here is the stuff of originality. For it is in the totality of experience reckoned with, filed, and forgotten, that each man is truly different from all others in the world." - Ray Bradbury
Isaac Asimov discusses the concept of "right" and "wrong" in scientific theories, using the example of the belief in a flat earth and how our understanding of the Earth's shape has evolved over time.
There is, however, a simple formula for checking if what you’re doing is sustainable: how long does it take on a vacation or weekend until you stop feeling anxious, and how anxious do you start feeling when you think about returning to work on Monday?