Descartes, the wonderful range of his observation and his curiosity, the unwearying zest of his scrutiny of well-nigh all the known fields of Nature, must have been an inspiration to multitudes of students besides those who have recorded their debt to him. It is probable that but for his literary genius, which though little discussed is of a very rare order, his influence would have been both narrower and less durable; but, being one of the great writers of the modern world, he has swayed men down till our own day. Certain it is that alongside of his doctrine there persisted in England, apart from all printed utterance, a movement of deistic rationalism, of which the eighteenth century saw only the fuller development. Sir John Suckling (1609-1641), rewriting about 1637 his letter to the Earl of Dorset, An Account of Religion by Reason, tells how in a first sketch it "had like to have made me an Atheist at Court," and how "the fear of Socinianism at this time renders every man that offers to give an account of religion by reason, suspected to have none at all"; [133] but he also mentions that he knows it "still to be the opinion of good wits that the particular religion of Christians has added little to the general religion of the world." [134] Himself a young man of talent, he offers quasi-rational reconciliations of faith with reason which can have satisfied no real doubter, and can hardly have failed to introduce doubt into the minds of some of his readers. § 5. Popular Thought in Europe