People and animals, plants, buildings, works of art can be beautiful, but can mathematics be beautiful? Godfrey Hardy, who called his profession pure mathematics, left the world a wonderful work that is still popular among people passionate about the exact sciences all over the world “Apology for a Mathematician”, dedicated to the unique “philosophy of mathematics” - pure science, brilliant games of the mind, free flight of intellectual imagination, which the author compared with the inspiration of a poet, artist or chess player. The main object of his admiration, his muse, becomes the theory of numbers - “mathematics for mathematics,” the scientific analogue of the British “pure art,” which has long been beloved. Mathematics, devoid of applied “triviality” and “ugliness” and beautiful, among other things, because it is not capable of causing harm to humanity. The publishing layout of the book is saved in PDF A4 format.