A passage from Zeno of Citium
Zeno of Citium, Fragments (in Diogenes Laërtius) Lives 7.25
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The use of wine in abundance is a freezing of the mind. The wise man will use it with moderation, or not at all.
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Men seek retreats for themselves, houses in the country, sea-shores, and mountains... But this is altogether a mark of the most common sort of men, for it is in thy power whenever thou shalt choose to retire into thyself.
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Take away thy opinion, and then there is taken away the complaint, 'I have been harmed.' Take away the complaint, and the harm is taken away.
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At dawn, when you have trouble getting out of bed, tell yourself: 'I have to go to work — as a human being.'