With regard to the intellectual and ethical condition of the soul and its destiny, the speculative thinkers of other nations, arguing from reason alone and having no divine revelation to guide or confirm their speculations, are agreed that the only way in which the soul, which belongs to a higher world, can be freed from this world of body and change is through _intellectual excellence_ and _right conduct_. Accordingly they classify souls into four kinds. The soul, they say, may have health, sickness, life, death. Health signifies _wisdom_ or _knowledge_; sickness denotes _ignorance_. Life means the _fear of God_ and _right conduct_; death is _neglect of God_ and _evil practice_. Every person combines in himself one of the two intellectual qualities with one of the two ethical qualities. Thus we have four classes of persons. A man may be wise and pious, wise and wicked, ignorant and pious, ignorant and wicked. And his destiny after death is determined by the class to which he belongs. Thus when a man who is wise and pious departs this world, his soul by reason of its wisdom separates from the body and exists in its own form as before. Owing to its piety it will rise to the upper world until it reaches the pure, eternal form, with which it will unite for ever. If the man is wise and wicked, the wisdom of the soul will enable it to exist without body; but on account of its wickedness and indulgence in the desires of this world, it cannot become completely free from the creatures of this world, and the best it can do is to rise above the sublunar world of change to the world of the planets where the forms do not change, and move about beneath the light of the sun, the heat of which will seem to it like a fire burning it continually, and preventing it from rising to the upper light. If the man is ignorant and pious, his soul will be saved from body in order that it may exist by itself, but his ignorance will prevent his soul from leaving the atmosphere of the lower world. Hence the soul will have to be united with body a second, and a third time, if necessary, until it finally acquires knowledge and wisdom, which will enable it to rise above the lower world, its degree and station depending upon the measure of intellect and virtue it possesses at the time of the last separation from the body. The soul of the man who is both ignorant and wicked cannot be saved from the body entirely, and dies like a beast.