"If He can be limited to human ideas, He is not God."

"The purport of this is that God is almighty, but His greatness cannot be brought within the grasp of human limitation. We cannot limit God to a boundary. Man is limited, but the world of Divinity is unlimited. Prescribing limitation to God is human ignorance. God is the Ancient, the Almighty; His attributes are infinite. He is God because His light, His sovereignty, is infinite. If He can be limited to human ideas, He is not God. Strange it is that, notwithstanding these are self-evident truths, man continues to build walls and fences of limitation about God, about Divinity so glorious, illimitable, boundless. Consider the endless phenomena of His creation. They are infinite; the universe is infinite. Who shall declare its height, its depth and length? It is absolutely infinite. How could an almighty sovereignty, a Divinity so wondrous, be brought within the limitations of faulty human minds even as to terms and definition? Shall we then say that God has performed a certain thing and He will never be able to perform it again? That the Sun of His effulgence once shone upon the world but now has set forever? That His mercy, His grace, His bounty once descended but now have ceased? Is this possible? No! We can never say nor believe with truth that His Manifestation, the adored verity, the Sun of Reality, shall cease to shine upon the world."

`Abdu'l-Bahá, The Promulgation of Universal Peace, pp. 274-275 

17 August 1912 
(excerpt from) Talk at Green Acre 
Eliot, Maine