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Chaitanya is not known to have written anything himself except for a series of verses known as the "Siksastaka", or "eight verses of instruction", which he had spoken, and were recorded by one of his close colleagues. The eight verses created by Chaitanya are considered to contain the complete philosophy of Gaudiya Vaishnavism in condensed form. Chaitanya requested a select few among his followers (who later came to be known as the Six Gosvamis of Vrindavan) to systematically present the theology of bhakti he had taught to them in their own writings. The six saints and theologians were Rupa Goswami, Sanatana Goswami, Gopala Bhatta Goswami, Raghunatha Bhatta Goswami, Raghunatha Dasa Goswami and Jiva Goswami, a nephew of brothers Rupa and Sanatana. These individuals were responsible for systematising Gaudiya Vaishnava theology.