According to Immanuel Kant, a life of virtue is not just about actions, but also about thinking. As a philosopher, I find it fascinating that Kant believed people can think virtuously, and should.
Kant identified three simple rules for virtuous thinking in his 1790 book, "Critique of the Power of Judgment":
By following these rules, Kant thought a "sensus communis," or "communal sense," could result, improving mutual understanding by helping people appreciate how their ideas relate to others' ideas.
Author's summary: Kant's rules for virtuous thinking promote mutual understanding.