“The physical sun has its rising and its setting. The earthly world has its day and its night. After each sunset there is a sunrise and the coming of a new dawn. The Sun of Reality, likewise, has its rising and setting. There is a day and a night in the world of spirituality. After each departure there is a return and the dawning light of a new day.”

– ‘Abdu’l-Bahá, The Promulgation of Universal Peace