Marcus Aurelius says to himself in The Meditations that he’s grateful he wasn’t distracted from the essence of Stoic philosophy, living as a Stoic, by reading too many books on Logic and Physics. He thanks the gods:
[…] that, when I had an inclination to philosophy, I did not fall into the hands of any sophist, and that I did not waste my time on writers of histories, or in the resolution of syllogisms, or occupy myself about the investigation of celestial phenomena; for all these things require the help of the gods and fortune. (Meditations, 1.17)
This is followed by an interesting couple of passages near the start of Book 2, in which Marcus lists a series of Stoic doctrines about Physics, concerning human nature and the nature of the universe. He concludes by saying that these doctrines are enough for him. These are sandwiched between two reminders to set aside his textbooks.
Throw away your books! No longer distract yourself with them: it is not allowed. But as if you were already dying, look down upon the flesh. It is nothing but blood and bones and a network, a network of nerves, veins, and arteries. Consider the breath also, what kind of a thing it is, air, and not always the same, but every moment expelled and then drawn in again. The third part is the ruling faculty [hegemonikon]. Consider that you are an old man; no longer let yourself be a slave, no longer like a puppet whose strings are pulled by selfish impulses. No longer be dissatisfied either with your present lot, nor dread the future.
All that is from the gods is full of Providence. That which is from fortune is not separate from nature or from interweaving and interlacing with the things which ordered by Providence. From that all things flow, and there is also necessity, and that which is for the welfare of the whole universe, of which you are a part. But that which the nature of the whole brings about, and what serves to maintain this nature, is good for every part of nature. Now the universe is preserved, by the changes of the elements but also by the changes of things compounded of the elements.
Let these doctrines be enough for you, hold them always as fixed principles [dogmas]. But cast away your thirst after books, that you may not die murmuring, but cheerfully, truly, and from your heart thankful to the gods. (Meditations, 2.2-3)
Elsewhere he wrote:
Always bear this in mind; and another thing too, that very little indeed is necessary for living a happy life. And because thou hast despaired of becoming a dialectician and skilled in Physics, do not for this reason renounce the hope of being both free and modest and social and obedient to God. (Meditations, 67)
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