Duration
Heng
The endurance of consistent movement — thunder and wind mutually sustaining each other in perpetual motion. This hexagram speaks to long-term commitment and the power of steadiness over time. Not a sprint but a life's direction; the constant bearing that gradually defines what a person is.
The image. Thunder moves above the wind — great force sustained by the persistent flow beneath.
Stay the course with steady, consistent application. Duration requires direction rather than constant intensity — persist through variation without losing your essential bearing.
How it’s built
Every hexagram is two trigrams — the lower one beneath the upper. This one is Xùn below Zhèn.