The developments of literary theory since the 1960s have stressed the impossibility of knowing the authors' real purposes when they compose a literary work. What we can say is that, whatever Kipling's purposes, the repetition of the word IF at the beginning of a line (a figure of speech called "anaphora") creates rhythm in the poem. In his Linguistic Guide to English Poetry Geoffrey Leech links repetitions and verbal parallelism to music. It is also useful to note that repetitions/verbal parallelisms are different from mere duplication. In Kipling's lines there is an element of sameness ("If you can. . .") and an element of variation (the other part of the line). In addition to the creation of rhtyhm, the repetition of the word IF gives the poem a didactic tone which conveys to its readers the meaning of true adulthood.