Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational argument. In more casual speech, by extension, "philosophy" can refer to "the most basic beliefs, concepts, and attitudes of an individual or group".
The word "philosophy" comes from the Ancient Greek φιλοσοφία (philosophia), which literally means "love of wisdom". The introduction of the terms "philosopher" and "philosophy" has been ascribed to the Greek thinker Pythagoras.
Theosophy (from Greek θεοσοφία theosophia, from θεός theos, God + σοφία sophia, wisdom; literally "God's wisdom"), refers to systems of esoteric philosophy concerning, or investigation seeking direct knowledge of, presumed mysteries of being and nature, particularly concerning the nature of divinity. Theosophy is considered a part of the broader field of esotericism, referring to hidden knowledge or wisdom that offers the individual enlightenment and salvation. The theosopher seeks to understand the mysteries of the universe and the bonds that unite the universe, humanity, and the divine. The goal of theosophy is to explore the origin of divinity and humanity, and the world. From investigation of those topics, theosophers try to discover a coherent description of the purpose and origin of the universe.
The name Theosophy is often used in modern times to refer to the religio-philosophic doctrines of the Theosophical Society founded in New York City in 1875 by Henry Steel Olcott with William Quan Judge and Helena Petrovna Blavatsky. Blavatsky's magnum opus, one of the major foundational works of this Theosophy, was published in 1888 as The Secret Doctrine. Theosophical Societies and Organizations remain active in more than 50 countries around the world. Theosophy has also given rise to or influenced the development of other mystical, philosophical, and religious movements. More: http://en.wikipedia.org/wiki/Theosophy