The Transformation of the Concept of Eudemonia in Islamic Philosophy from Al- Kendi to Al- Tusi

Seeking for Happiness in Islamic Philosophy and its goal, it can be seen a literal and unanimous answer in philosopher words which reflects combination of worldly(secular) and otherworldly(sacred) happiness that it can prepare temporal and eschatological happiness. But in a deeper investigation we can ask: what is the main purpose? mortal or final dimension of happiness? As a result of the text, it seems that from Al- Kendi to Al- Rāzī the otherworldly happiness is considered as a result of worldly happiness. After Al- Farabi to Al- Tusi the flow of thinking tends to combine worldly and otherworldly happiness. After Al- Tusi and under the influence of him in Nasirian Ethics (Akhlaq-i Nasiri), the changed version of philosophical Islamic Ethics supports eschatological happiness and supposes the worldly happiness as a primary and elementary level which must be considered as healing of mortal life. Matching with this view, it seems that worldly happiness is Abolished, because it changes the balance between and worldly and otherworldly happiness, and also it week the social development instead of increasing individual happiness.