The pacificism is one of the important bases of Islamic mysticism (Sufism). Base on the pacificism, the mystic knows God as existential and absolute truth and there is one but God. So the mystic loves all the cosmos and it is his certain doctrine. This kind of mystical thinking appears in Roomi 's works, like: Masnavi Manavi and lyrics of Shams. His pacificism is based on pantheism and love, through pantheism he sees cosmos the illumination of God (theophany) and through love he loves all the things which there is no one but God. So the hate has not any place in the Roomi 's heart and thoughts. The Roomi 's pacificism is defined in the two parts: humanistic pace and universal pace. The humanistic pace is the pace which Roomi through it loves all the people even his enemy. The results of this part are justice, security, dedication, guidance, honesty, freshness, beauty, and love. The universal pace is the pace which he through it loves cosmos and nature. Its results are the respect to the nature as a living thing and the aesthetic attitude to the world. Roomi believes that his doctoring about pacificism is based on knowledge and wisdom so he proves it by reasons and allegories.

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