Seneca, in turn, elaborated on the tranquility, or peace of mind, associated with virtue: What we want to discover, then, is how the mind may always maintain an even and favorable course, may be well-disposed toward itself, may be happy in contemplating its own condition, and may have this happiness without interruption – how it can stay calmly in that position, never carrying itself off and never cast down. This will be peace of mind. Seneca, On Tranquility of Mind 2.4
