Quotation zu Dewarim 4:39

It is our obligation to praise the Master of all, to ascribe greatness to the Creator of [the world in] the beginning: that He has not made us like the nations of the lands, and has not positioned us like the families of the earth; that He has not assigned our portion like theirs, nor our lot like that of all their multitudes. For they prostrate themselves to vanity and nothingness, and pray to a god that cannot deliver. But we bow, prostrate ourselves, and offer thanks before the Supreme King of kings, the Holy One blessed is He, Who spreads the heavens, and establishes the earth, and the seat of His glory is in the heaven above, and the abode of His invincible might is in the loftier heights. He is our God, there is nothing else. Our King is true, all else is insignificant, as it is written in His Torah: “And You shall know this day and take into your heart that Adonoy is God in the heavens above and upon the earth below; there is nothing else.”

Of this the believer is not permitted by our religion to remain in ignorance, for the Torah exhorts us on this in saying "Therefore, know this day and consider within your heart, that the L-ord is G-d in Heaven above and on the earth below. There is none other" (Deut. 4:39).