Philosophy and thought are the basis of Islam, which is an ideological faith. It has its own ideology, logic and science. Islamic philosophy may be defined in various ways, but in fact Islamic philosophy works within the framework of Islamic theology and culture. However, it is not necessarily concerned with religious issues or confined to Muslims alone. From the very beginning, theoretical questions were raised, the questions which could to a certain extent be answered by reference to Islamic texts, such as Holy Quran, old conventions and practices of the community and the sayings of the Prophet and opinion of his Companions. On an initial basis, a whole range of what came to be known as the Islamic knowledge, came to be produced, and that consisted largely of religious law, the Arabic language and forms of theology, which represented various ways of understanding Islam. Islamic philosophy has always had a rather difficult relationship with the Islamic sciences-the techniques for answering theoretical questions, which are closely linked with the religion of Islam, comprising law, theology, language and the study of the religious texts themselves. When Prophet Muhammad (Pbuh) professed a new faith, his purpose was to bring out a kind of community spirit that was to make the world one nation to promote universal brotherhood. Islam developed as a community of men in the service of Allah, the one and only God-Lord of all the worlds. Islamic or Muslim Philosophy is a vast subject, enriched with great traditions, theories and scholarship. It needs great books to explain the ocean of ideas. This encyclopaedic study is an asset for all scholars of philosophy, Islamic Studies and of course those, who desire to know Islam, in depth.