Ethics right|thumb|Zeno, portrayed as a medieval scholar in the Nuremberg Chronicle Like the Cynics, Zeno recognised a single, sole and simple good,Cicero, Academica, i. 10. 35–36 : "Zeno igitur nullo modo is erat qui ut Theophrastus nervos virtutis inciderit, sed contra qui omnia quae ad beatam vitam pertinerent in una virtute poneret nec quicquam aliud numeraret hi bonis idque appellaret honestum quod esset simplex quoddam et solum et unum bonum." which is the only goal to strive for.Cicero, de Finibus, iii. 6. 8; comp. . "Happiness is a good flow of life," said Zeno,Stobaeus, 2.77. and this can only be achieved through the use of right reason coinciding with the universal reason (Logos), which governs everything. A bad feeling (pathos) "is a disturbance of the mind repugnant to reason, and against Nature."Cicero, Tusculanae Quaestiones, iv. 6. This consistency of soul, out of which morally good actions spring, is virtue,Cicero, Tusculanae Quaestiones, iv. 15. true good can only consist in virtue.
ethics right|thumb|zeno portrayed as a medieval scholar in the nuremberg chronicle like the cynics zeno recognised a single sole and simple goodcicero academica i 10 35–36  "zeno igitur nullo modo is erat qui ut theophrastus nervos virtutis inciderit sed contra qui omnia quae ad beatam vitam pertinerent in una virtute poneret nec quicquam aliud numeraret hi bonis idque appellaret honestum quod esset simplex quoddam et solum et unum bonum" which is the only goal to strive forcicero de finibus iii 6 8; comp  "happiness is a good flow of life" said zenostobaeus 277 and this can only be achieved through the use of right reason coinciding with the universal reason (logos) which governs everything a bad feeling (pathos) "is a disturbance of the mind repugnant to reason and against nature"cicero tusculanae quaestiones iv 6 this consistency of soul out of which morally good actions spring is virtuecicero tusculanae quaestiones iv 15 true good can only consist in virtue