Cleanthes of Assos · Philosophy
Cleanthes made one small addition to Zeno’s definition of the goal of life - the words ‘with nature’ - and in doing so fixed the compass of Stoic ethics for centuries: to live well is to live in agreement not merely with oneself, but with the rational order of the whole.
Every ancient school offered an account of the telos - the end or goal that makes a life go well, the target at which all our choices ultimately aim. Zeno, the founder of Stoicism, gave a famously terse answer: the goal is homologoumenos zen, ‘living in agreement.’ The word carries the idea of a life that is of one logos with itself - consistent, harmonious, all of a piece, with no part at war with another. A good life, on this first formulation, is a life whose every action flows from a single, coherent rational disposition, so that the person never contradicts themselves in deed as they would hate to in thought. It is a beautiful ideal of inner integrity. But it left an obvious question hanging, and Cleanthes was the one who pressed it.
‘Nature’ in Cleanthes’s formula works on two levels at once, and the depth of the idea lies in their coinciding. There is universal nature - the whole cosmos governed by the logos, the providential order praised in the Hymn to Zeus. And there is human nature - and what is essential to a human being, for the Stoics, is reason. To live in agreement with nature is therefore to live according to reason: to bring one’s own rational nature into accord with the rational nature of the whole. These are not two separate demands, because human reason is quite literally a fragment of the cosmic Reason, a spark of the same divine fire. So living rightly is at once self-realization and cosmic conformity: to become fully what a rational being is is to fall into step with the order of the universe. Virtue is the name for a soul in that double agreement.
Once the goal is living in agreement with nature, the rest of Stoic ethics unfolds from it. If the good life is life according to reason, then the only thing that is truly good is virtue (a soul in rational accord with nature), and the only thing truly bad is vice. Everything else that people chase or flee - wealth and poverty, health and sickness, reputation, even pleasure and pain - is neither good nor bad in itself. The Stoics called these ‘indifferents,’ not because they do not matter at all, but because they do not determine whether a life is good. And here Cleanthes held the hard line with special firmness: he taught that virtue is life according to nature, but that pleasure is not according to nature and has no value of its own. The virtuous person is happy, he insisted, even without the things fortune hands out - a claim his own laborious life would put to the test.
This is the opening of the lesson. The rest — the dialogue, the primary source, and the recall — is in the app.
You learned that Zeno defined the goal ( telos ) as ‘living in agreement,’ that Cleanthes added ‘with nature’ to give that agreement an object, and that the resulting formula - living in agreement with nature - means living by reason and virtue, in tune with the logos that governs the whole. Explain what the addition…
Leads to Zeno of Citium.
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