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The Unconquerable Mind
Marcus Aurelius
Meditations

A reflection on the mind as an unconquerable fortress that, when free from passion and guided by reason, becomes a place of impregnable defense for the individual.

...doth hinder thee. Let it not grieve thee then, if it be not thy fault that the thing is not performed. 'Yea but it is a thing of that nature, as that thy life is not worth the while, except it may be performed.' If it be so, upon condition that thou be kindly and lovingly disposed towards all men, thou mayest be gone. For even then, as much as at any time, art thou in a very good estate of performance, when thou doest die in charity with those, that are an obstacle unto thy performance. XLVI.
Remember that thy mind is of that nature as that it becometh altogether unconquerable, when once recollected in herself, she seeks no other content than this, that she cannot be forced: yea though it so fall out, that it be even against reason itself, that it cloth bandy. How much less when by the help of reason she is able to judge of things with discretion? And therefore let thy chief fort and place of defence be, a mind free from passions. A stronger place, (whereunto to make his refuge, and so to become impregnable) and better fortified than this, hath no man.
He that seeth not this is unlearned. He that seeth it, and betaketh not himself to this place of refuge, is unhappy. XLVII. Keep thyself to the first bare and naked apprehensions of things, as they present themselves unto thee, and add not unto them. It is reported unto thee, that such a one speaketh ill of thee. Well; that he speaketh ill of thee, so much is reported. But that thou art hurt thereby, is not reported: that is the addition of opinion, which thou must exclude. I see that my child...
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Marcus Aurelius

Meditations

Mind's Inviolable Space

This excerpt directly reinforces the parent's core thesis by explicitly listing external forces—fire, iron, tyranny, slander—that cannot penetrate or hinder the mind, echoing the idea of its inherent and absolute resilience when it remains in its proper domain.

...XXXIX. That which is a hindrance of the senses, is an evil to the sensitive nature. That which is a hindrance of the appetitive and prosecutive faculty, is an evil to the sensitive nature. As of the sensitive, so of the vegetative constitution, whatsoever is a hindrance unto it, is also in that respect an evil unto the same. And so likewise, whatsoever is a hindrance unto the mind and understanding, must needs be the proper evil of the reasonable nature. Now apply all those things unto thyself.
Do either pain or pleasure seize on thee? Let the senses look to that. Hast thou met with Some obstacle or other in thy purpose and intention? If thou didst propose without due reservation and exception now hath thy reasonable part received a blow indeed But if in general thou didst propose unto thyself what soever might be, thou art not thereby either hurt, nor properly hindered. For in those things that properly belong unto the mind, she cannot be hindered by any man. It is not fire, nor iron; nor the power of a tyrant nor the power of a slandering tongue; nor anything else that can penetrat...
XL. If once round and solid, there is no fear that ever it will change. XLI. Why should I grieve myself; who never did willingly grieve any other! One thing rejoices one and another thing another. As for me, this is my joy, if my understanding be right and sound, as neither averse from any man, nor refusing any of those things which as a man I am subject unto; if I can look upon all things in the world meekly and kindly; accept all things and carry myself towards everything according to to tr...

Marcus Aurelius

Meditations

The Mind's Sovereignty

This text explains the mechanism for maintaining the mind's power: by consciously keeping the underlying judgments and representations of things 'fresh and alive.' It answers *how* one sustains the philosophical resolutions that grant happiness and an unconquerable state.

...n and known in the world. And so oft as anything doth happen that might otherwise trouble thee, let this memento presently come to thy mind, that it is that which thou hast already often Seen and known. Generally, above and below, thou shalt find but the same things. The very same things whereof ancient stories, middle age stories, and fresh stories are full whereof towns are full, and houses full. There is nothing that is new. All things that are, are both usual and of little continuance. II.
What fear is there that thy dogmata, or philosophical resolutions and conclusions, should become dead in thee, and lose their proper power and efficacy to make thee live happy, as long as those proper and correlative fancies, and representations of things on which they mutually depend (which continually to stir up and revive is in thy power,) are still kept fresh and alive? It is in my power concerning this thing that is happened, what soever it be, to conceit that which is right and true. If it be, why then am I troubled? Those things that are without my understanding, are nothing to it at al...
III. That which most men would think themselves most happy for, and would prefer before all things, if the Gods would grant it unto them after their deaths, thou mayst whilst thou livest grant unto thyself; to live again. See the things of the world again, as thou hast already seen them. For what is it else to live again? Public shows and solemnities with much pomp and vanity, stage plays, flocks and herds; conflicts and contentions: a bone thrown to a company of hungry curs; a bait for greedy...

David Hume

An Enquiry Concerning Human Understanding

The Limited Self-Command

Hume questions the extent to which the mind can command itself, arguing that its limits are known only through experience, not reason. This casts doubt on the parent text's assertion that the mind can become unconquerable through recollection and reason.

...n; a production of something out of nothing: Which implies a power so great, that it may seem, at first sight, beyond the reach of any being, less than infinite. At least it must be owned, that such a power is not felt, nor known, nor even conceivable by the mind. We only feel the event, namely, the existence of an idea, consequent to a command of the will: But the manner, in which this operation is performed, the power by which it is produced, is entirely beyond our comprehension. Secondly,
The command of the mind over itself is limited, as well as its command over the body; and these limits are not known by reason, or any acquaintance with the nature of cause and effect, but only by experience and observation, as in all other natural events and in the operation of external objects. Our authority over our sentiments and passions is much weaker than that over our ideas; and even the latter authority is circumscribed within very narrow boundaries. Will any one pretend to assign the ultimate reason of these boundaries, or show why the power is deficient in one case, not in another....
Is there not here, either in a spiritual or material substance, or both, some secret mechanism or structure of parts, upon which the effect depends, and which, being entirely unknown to us, renders the power or energy of the will equally unknown and incomprehensible? Volition is surely an act of the mind, with which we are sufficiently acquainted. Reflect upon it. Consider it on all sides. Do you find anything in it like this creative power, by which it raises from nothing a new idea, and with...

Aristotle

Nicomachean Ethics

Appetite's Obedience

Aristotle provides practical guidance on achieving inner mastery by emphasizing the need to moderate desires and make the appetitive principle obedient to Reason, directly addressing how to cultivate a mind free from passions.

...which secondarily or derivatively, is not relevant to the present subject, but it is evident that the later in point of time must get the name from the earlier. And the metaphor seems to be a very good one; for whatever grasps after base things, and is liable to great increase, ought to be chastened; and to this description desire and the child answer most truly, in that children also live under the direction of desire and the grasping after what is pleasant is most prominently seen in these.
Unless then the appetite be obedient and subjected to the governing principle it will become very great: for in the fool the grasping after what is pleasant is insatiable and undiscriminating; and every acting out of the desire increases the kindred habit, and if the desires are great and violent in degree they even expel Reason entirely; therefore they ought to be moderate and few, and in no respect to be opposed to Reason. Now when the appetite is in such a state we denominate it obedient and chastened. In short, as the child ought to live with constant regard to the orders of its educator,...
So then in the man of Perfected Self-Mastery, the appetitive principle must be accordant with Reason: for what is right is the mark at which both principles aim: that is to say, the man of perfected self-mastery desires what he ought in right manner and at right times, which is exactly what Reason directs. Let this be taken for our account of Perfected Self-Mastery. BOOK IV Chapter I. We will next speak of Liberality. Now this is thought to be the mean state, having for its object-matte...