Marc Andreessen was celebrated by many when he went on the David Senra podcast and claimed that the great men of history weren't introspective. Zero introspection at all. Some people clung to his words, while fewer bothered to check if Caesar and Napoleon embarked on campaigns with little thought.
Underneath this noise there is a question worth asking. What is introspection, is it useful, and when does it stop being so?
Perhaps Andreessen got the word wrong. Rumination is related to introspection but has a completely different meaning. Moreover, rumination compounds, becoming a loop. It looks like this: you return to the same existential idea at 2AM every night. This process produces nothing new. Maybe you blame lack of sleep for the unraveling of your day, when in fact you're leaking mental energy.
Introspection in the highest sense is movement. Marcus Aurelius's journal, known today as his Meditations, at first reads like a rumination loop. Nevertheless, if you read between the lines, you can feel growth. He notes situations that arose throughout his day, reflects on them (something happened), interprets them (this is what it meant to me), then decides (this is the improved standard I'll hold myself to tomorrow). Then he proceeded to run the most powerful empire in the world.
Note, extract, exit.
The difference isn't in whether he looks inward or not. The difference between rumination and introspection is in whether the process concludes with something that can be acted upon.
The great men Andreessen alludes to, Rockefeller, Darwin, and Caesar, didn't sit still. So far so good in terms of what he claims. That they were without feeling is highly unlikely. But ultimately whether these great men let anger or resentment in, those feelings didn't get in the way of running empires, building great things, and changing the way humans understand the world. Reflection was essential for them to chart their courses—see Rockefeller's meticulous ledgers, which recorded every transaction and decision down to the cent—but its main goal was to serve the action, rather than be the final destination.
Which brings us back to the question of what introspection actually is.
A good definition for practical introspection is what follows: this is what the situation means, this is what I'll change, now I move on. Regret is only useful for extracting the lesson. Once the lesson has been learned, continuing to regret is grief without a grave.
Somewhere along the way introspection acquired additional meanings. The word became something to be sold, then something to be performed. When people question every facet of their identity, the ground beneath them starts to fall. They then start making identity a thing to be publicly acknowledged and accommodated. If I'm not referred to in the way I want to be, my life is ruined. This dependence on outward appearance—physical and mental—produces fragility, because the self becomes a permanent object of attention rather than a tool to make sense of the world and achieve goals. Some understanding of the self is necessary, but only to the point where you can get out of your own way.
Rejecting an unintentionally expanded definition of introspection makes sense. Rejecting a powerful tool that served the most successful people in history because of a semantic mistake doesn't.
Introspection isn't therapy. It helps us move forward better. What if we treated reflection as a private and forward-facing act rather than a practice we perform publicly or to hide behind? The answer is less mystical than what some gurus make it seem.