"The Two Paths" is a collection of five lectures delivered in 1858 and 1859 by John Ruskin on art and architecture. This is how the author himself presents the book: "The following addresses, though spoken at different times, are intentionally connected in subject; their aim being to set one or two main principles of art in simple light before the general student, and to indicate their practical bearing on modern design. The law which it has been my effort chiefly to illustrate is the dependence of all noble design, in any kind, on the sculpture or painting of Organic Form." The most famous of these, the fifth lecture, is commonly known simply as "The Work of Iron".