The physical manifestation of life is that part pertaining to matter and the movement thereof. The mental manifestation of life is that part that develops consciousness through the organization and utilization of material things. The spiritual manifestation of life is that part that directs constructive planning towards purification and perfection of purpose. A thorough knowledge of both physical and mental manifestations is necessary before spirituality can be understood. Just as perfect mental efficiency cannot be had in an inefficient physical thing, neither can efficient spirituality be had in an inefficient mental thing.
Spirituality therefore aims to develop the highest type of physical and mental things.
Innumerable living, moving bodies are constantly swirling about within an inch of man's eye which he cannot see because the scope of his sight is developed within a scale most suitable for his own needs. Billions of living things fly about the point of a man's eyebrow without knowing there is such a thing as a man nor understanding the size or nature of an eyebrow. Man, the solar system and the entire visible universe, as far as man's sight and understanding is concerned, pass through greater living things without knowing anything about them. The magnitude and minuteness of living things have no limits. The principles of life are simple but immutable.