Northrop Frye, commenting on Blake's consistency in strongly held views, notes Blake "himself says that his notes on Reynolds, written at fifty, are 'exactly Similar' to those on Locke and Bacon, written when he was 'very Young'. Even phrases and lines of verse will reappear as much as forty years later. Consistency in maintaining what he believed to be true was itself one of his leading principles ... Consistency, then, foolish or otherwise, is one of Blake's chief preoccupations, just as 'self-contradiction' is always one of his most contemptuous comments".