171. To eliminate the reference to matter might seem to be more easy than to substitute for it a reference to God. If the object of the idea is only the idea itself, does not all determination by relation logically disappear from the idea, except (perhaps) such as consists in the fact of its sequence or antecedence to other ideas? This issue was afterwards to be tried by Hume--with what consequences to science and religion we shall see. Berkeley avoids it by insisting that the ‘percipi,’ to which ‘esse’ is equivalent, implies reference to a mind. At first sight this reference, as common to all ideas alike, would not seem to avail much as a basis either for a distinction between the real and fantastic or for any Theism except such as would ‘entitle God to all our fancies.’ If it is to serve Berkeley’s purpose, we must suppose the idea to carry with it not merely a relation to mind but a relation to it as its effect, and the conscious subject to carry with him such a distinction between his own mind and God’s as leads him to refer his ideas to God’s mind as their cause when they are lively, distinct and coherent, but when they are otherwise, to his own. And this, in substance, is Berkeley’s supposition. To show the efficient power of mind he appeals to our consciousness of ability to produce at will ideas of imagination; to show that there is a divine mind, distinct from our own, he appeals to our consciousness of inability to produce ideas of sense. Is it then a succession of feelings?