At a time when darkness had encompassed the world, the ocean of divine favour surged and His Light was made manifest, that the doings of men might be laid bare. This, verily, is that Light which hath been foretold in the heavenly scriptures. Should the Almighty so please, the hearts of all men will be purged and purified through His goodly utterance, and the light of unity will shed its radiance upon every soul and revive the whole earth. Baha’u’llah, The Tabernacle of Unity. Available from https://reference.bahai.org/en/t/b/TU/tu-3.html#pg8