e. Commanding the good and forbidding evil (al-amr bi al-ma'ruf wa al   nahy 'an al-munkar).
2. Period First Philosophy  Â
Islamic philosophy first period is the period of the rise of Muslim philosophers in the East region, respectively:
a. Al-Kindi (806-873 AD)
b. Al-Razi (865-925 AD)
c. Al-Farabi (870-950 AD)
d. Avicenna (980-1037 AD).
3. Kalam Second Period
This period is characterized by the appearance of kalam important figures and major influence on the development of next theology, among others:
a. Al-Asyi'ari (873-957 AD)
Initially he was pengenut Mu'tazila, but because it is not satisfied with the explanations given by the teacher, Al-Juba'i, finally he came out of Mu'tazila. Flow and pahamnya called Asy'ariyah. In addition to Al-Matudiri Ash'arite well.