You have to learn a few things, which you do along the way, but basically, poetry is a matter of the ear. Iambic pentameters or what constitutes a stanza comes naturally - your ears will know.
Vikram SethIn a painting, you can't make out whether the artist painted the left eye before the right eye. In Chinese calligraphy, you can see the progression of the artist's stroke.
Vikram SethAnd the process of reading is such a private one. I once came into a room where a friend of mine was reading one of my books, and he clicked his tongue impatiently and shooed me off.
Vikram Seth