Post tenebras lux is a Latin phrase translated as Light After Darkness. It is Post tenebras spero lucem ("After darkness, I hope for light") in the Vulgate version of Job 17:12[1].
The phrase was adopted as the Calvinist motto, and was subsequently adopted as the motto of the entire Protestant Reformation,[2] and also of John Calvin's adopted city of Geneva, Switzerland. As a mark of its role in the Calvinist movement, the motto is engraved on the Reformation Wall, in Geneva, and the Huguenot Monument, in Franschhoek, South Africa.
Post tenebras lux was formerly the state motto of Chile, before being replaced by the Spanish Por la razón o la fuerza (By reason or by force).
It is/was the motto of: