nÄrada uvÄcapuruá¹£aá¹ purañjanaá¹ vidyÄd
yad vyanakty Ätmanaḥ puram
eka-dvi-tri-catuá¹£-pÄdaá¹
bahu-pÄdam apÄdakam
nÄradaḥ uvÄca — NÄrada said; puruá¹£am — the living entity, the enjoyer; purañjanam — King Purañjana; vidyÄt — one should know; yat — inasmuch as; vyanakti — he produces; Ätmanaḥ — of himself; puram — dwelling place; eka — one; dvi — two; tri — three; catuḥ-pÄdam — with four legs; bahu-pÄdam — with many legs; apÄdakam — without legs.
How the spirit soul transmigrates from one type of body to another is nicely described here. The word eka-pÄda, “one-legged,†refers to ghosts, for it is said that ghosts walk on one leg. The word dvi-pÄda, meaning “biped,†refers to human beings. When he is old and invalid, the human being is supposed to be a triped, or three-legged, because he walks with the help of a stick or some kind of cane. Of course, the word catuá¹£-pÄda refers to quadrupeds, or animals. The word bahu-pÄda refers to those creatures who have more than four legs. There are many insects, such as the centipede, and also many aquatic animals that have many legs. The word apÄdaka, meaning “without legs,†refers to serpents. The name Purañjana indicates one who enjoys possessing different types of bodies. His mentality for enjoyment in the material world is accommodated by different types of bodies.