Shaiva Siddhanta (IAST: Śaiva-siddhānta) (Tamil: சைவ சித்தாந்தம் "Caiva cittāntam") is a form of Shaivism that propounds a dualistic philosophy where the ultimate and ideal goal of a being is to become an enlightened soul through Shiva's grace. It draws primarily on the Tamil devotional hymns written by Shaiva saints from the 5th to the 9th century, known in their collected form as Tirumurai. Meykandadevar (13th century) was the first systematic philosopher of the school.The normative rites, cosmology and theology of Shaiva Siddhanta draw upon a combination of Agamas and Vedic scriptures.