We have two ears and one mouth, so we should listen more than we say.
Variants
The reason why we have two ears and only one mouth is that we may listen the more and talk the less.
A bad feeling is a commotion of the mind repugnant to reason, and against nature.
No evil is honorable; but death is honorable; therefore death is not evil.
Love is a God, who cooperates in securing the safety of the city.
Quote text and notes from Wikiquote: Zeno of Citium (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.