"The Expounder of the Book"

'Abdu'l-Baha

"That which has come forth from the Center of the Covenant you must take fast hold of. That which issues from my lips and that which is written with my pen is the Reality. With this you can irrigate the vineyard of God. With this you can make the tree of the Cause of God become verdant. Through this the Name of the Kingdom of God will be spread all over the world. Through this the Sun of Reality will shine. Through this the clouds of Mercy will pour down." 
-‘Abdu’l-Baha  (Excerpt from some instructions given by Abdul-Baha to several friends in America, July, 1912, which received his personal signature; Star of the West, Vol. 11, No. 14, Nov. 23, 1920)