The Kural is one of the most important forms of classical Tamil language poetry. It is a very short poetic form being an independent couplet complete in 2 lines, the first line consisting of 4 words and the second line consisting of 3. As one of the five types of Venpa stanza, it must also conform to the grammar for Venpa, the most difficult and the most highly esteemed of stanzaic structures in classical Tamil literature. The Tirukkuṛaḷ by Tiruvalluvar, one of the greatest philosophical works in Tamil, is a typical example.