These are the characteristics of the rational soul: self-awareness, self-examination, and self-determination. It reaps its own harvest…. It succeeds in its own purpose…
—Marcus Aurelius, Meditations, 11.1-2
To be rational today, we have to do just three things:
First, we must look inward.
Next, we must examine ourselves critically.
Finally, we must make our own decisions—uninhibited by biases or popular notions.
* Source: The Daily Stoic by Ryan Holiday and Stephen Hanselman