I hate the guts of English grammar. … The approach to style is by way of plainness, simplicity, orderliness, sincerity…. You can say anything that comes into your head; never forget that.

White’s remark juxtaposes a visceral dislike of “English grammar” with a writer’s ethic that values clarity over pedantry. The point is not that rules are useless, but that an obsession with correctness can deaden prose and intimidate the writer. His prescription—plainness, simplicity, orderliness, sincerity—frames style as a moral and practical discipline: arrange thoughts clearly, avoid needless ornament, and mean what you say. The closing reassurance (“You can say anything that comes into your head”) asserts creative freedom, tempered by the reminder to keep faith with those virtues. In effect, White champions expressive range grounded in lucid, honest craft.