Benedict maintained that in the Western world, to a large degree, only positivistic reason and philosophy are valid. A concept of reason which excludes the divine, is incapable of entering into the dialogue of cultures, according to Benedict.[29] He quoted negative views of Emperor Manuel II Paleologus, regarding Islam, which several weeks after it was delivered, created violent reactions among Muslims in several parts of the world.[30][31][32][33][34] June 11, 2007 Pope Benedict XVI reverted the decision of his predecessor regarding papal elections, and restored the traditional two-thirds majority required[35] July 7, 2007: Motu proprio Summorum Pontificum is issued by Pope Benedict XVI explicitly liberating the Roman Missal of 1962 as an extraordinary form of the Roman Rite. Hopes of healing the schism between the SSPX and the Catholic Church is implied in accompanying letter to the motu proprio.