The light of the Percival correspondence first falls on Berkeley’s life in 1709. The earliest extant letters from Berkeley to Sir John Percival are in September, October, and December of that year, dated at Trinity College. In one of them he pronounces Socrates “the best and most admirable man that the heathen world has produced.” Another letter, in March, 1710, accompanies a copy of the second edition of the _Essay on Vision_. “I have made some alterations and additions in the body of the treatise,” he says, “and in the appendix have endeavoured to meet the objections of the Archbishop of Dublin;” whose sermon he proceeds to deprecate, for “denying that goodness and understanding are more to be affirmed of God than feet or hands,” although all these may, in a metaphorical sense. How far, or whether at all, God is knowable by man, was, as we shall see, matter of discussion and controversy with Berkeley in later life; but this shews that the subject was already in his thoughts. Returning to the _Essay on Vision_, he tells Sir John that “there remains one objection, that with regard to the uselessness of that book of mine; but in a little time I hope to make what is there laid down appear subservient to the ends of morality and religion, in a _Treatise_ I have in the press, the design of which is to demonstrate the existence and attributes of God, the immortality of the soul, the reconciliation of God’s foreknowledge and the freedom of man; and by shewing the emptiness and falsehood of several parts of the speculative sciences, to induce men to the study of religion and things useful. How far my endeavours will prove successful, and whether I have been all this time in a dream or no, time will shew. I do not see how it is possible to demonstrate the being of a God on the principles of the Archbishop—that strictly goodness and understanding can no more be assumed of God than that He has feet or hands; there being no argument that I know for God’s existence which does not prove Him at the same time to be an understanding and benevolent being, in the strict, literal, and proper meaning of these words.” He adds, “I have written to Mr. Clarke to give me his thoughts on the subject of God’s existence, but have got no answer.”