The teaching of immortality is to awaken. We must rise above physical and material conditions if we are to live at all. We must aim at being independent of physical sight and hearing. We know that if we really want to understand a thing, we close our eyes because we can see it better. If we are thinking in this manner, it means that we are listening to some thought corning from some other plane. At such a time we want to cut off and stop outward sound or sight. All the meditations and concentrations of the mystics, as well as their dreams, are their journeys to the inner planes. It is necessary, if the soul has the desire to know the past, the present, and the future, to satisfy its desire by a contemplative life. The more tired and exhausted the mind, the more is meditation needed.