Man in all conditions of life, whatever be his rank, position or possessions, has trouble, pains and difficulties. Where do these come from? From his limitations. But if limitations were natural, why should he not be contented with his troubles? Because limitation is not natural to the soul; the soul which is by nature free, feels uncomfortable in the life of limitation. In spite of all that this world can offer, when the soul experiences the highest degree of pain it refuses everything in order to fly from the spheres of the earth, and seek the spheres of liberty and that freedom which is the soul's destination. There is a longing hidden beneath all the other longings which man has, and that longing is for freedom. This longing is sometimes satisfied by walking in the solitude, in the woods, when one is left alone for a time, when one is fast asleep, when even dreams do not trouble one; and when one is in meditation, in which for a moment the activities of body and mind are both suspended. Therefore the sages have preferred solitude, and have always shown love for nature; and they have adopted meditation as the method of attaining that goal which is the freedom of the soul.