 On the formal side, the religious commitment appears in the frequent Qur’anic quotations in support of ancient doctrines, sometimes through interpretations that are not in line with the theological ones. Above all, the Ikhwân appropriate the Muslim ideal of attaining happiness in this world and the hereafter and indicate in the treatises how to reach it. In physical terms it is by caring for the body, which when healthy and balanced is the condition of the purification of the soul. In metaphysical terms, the purified soul is said to be capable of knowledge, so of being saved – even though, like the Ismâ‘îlis, the Ikhwân deny salvation as attainable through solely philosophy.