He came to believe that the doctrine of the Trinity was incorrect (as did Newton) and, although at first careful not to publicly oppose the views of the established church, he later became bolder and published his views in Sermons and Essays (1709).
Siya ang dumating sa naniniwala na ang doktrina ng Tatlong-isa ay hindi tama (bilang did Newton) at, bagaman sa unang maingat na hindi sa publiko na tutulan ang views ng mga naitatag ang simbahan, siya ay naging mas agresibong mamaya at inilathala ng kanyang views sa Sermons at Essays (1709).