Hardship and Happiness (Ad Marciam De consolatione, Ad Helviam matrem De consolatione, De Consolatione ad Polybium, De Brevitate Vitæ, De Constantia Sapientis, De Tranquillitate Animi, De Otio, De Vita Beata, De Providentia)

by Seneca

One should especially avoid grim fellows who deplore everything, men whom any excuse pleases to make complaints. Even if his loyalty and goodwill are certain, a troubled companion who groans at everything is the enemy of tranquility.

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