The quotation from Freud that opens Part 2 of Chapter 1 of 'Breaking the Spell' is as follows:
"Philosophers stretch the meaning of words until they retain scarcely anything of their original sense; by calling "God" some vague abstraction which they have created for themselves, they pose as deists, as believers, before the world; they may even pride themselves on having attained a higher and purer idea of God, although their God is nothing but an insubstantial shadow and no longer the mighty personality of religious doctrine."
-Sigmund Freud, The Future Of An Illusion