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“Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.”
― Karl Popper

“Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.”
― Marcus Aurelius , Meditations

“Don't explain your philosophy. Embody it.”
― Epictetus

“First say to yourself what you would be;
and then do what you have to do.”
― Epictetus