June 10

Every religion is divided into two parts. One part is concerned with the world of morality, the upliftment and advancement of the world of humanity, the knowledge of God and the discovery of the realities of things. This part of religion is spiritual and is its essential and fundamental part. It is the foundation of all the religions of God. Therefore, all religions are one and the same.

The second part has to do with social relationships. This part is not essential; it is subject to change according to the requirements of the time. In the time of Noah certain conditions required that all sea foods be made lawful. Because of certain exigencies at the time of Abraham, it was lawful for a man to marry his sister, even as Abel and Cain had done, but in the Torah this practice was prohibited. . 
- 'Abdu'l-Baha  (Words of ‘Abdu’l-Baha, From a talk at San Francisco’s Jewish Temple, October 12, 1912, San Francisco, USA, recorded by Mahmud Zarqani; ‘Mahmud’s Diary’) (To see the entire talk please visit Talks of ‘Abdu’l-Baha)