Source, in full
This statement is presented in quotes in The Philosophy of Religion and Advaita Vedanta (2008) by Arvind Sharma, p. 216, as a "Santayanan point", but earlier publications by the same author, such as in A Primal Perspective on the Philosophy of Religion (2006), p. 161, state it to be a stance of Santayana without actually indicating or in any ways implying that it is a direct quotation.