"As the spirit of man is not composed of material elements, it is not subject to decomposition and, therefore, has no death."

"Life is the expression of composition; and death, the expression of decomposition. In the world or kingdom of the minerals certain materials or elemental substances exist. When through the law of creation they enter into composition, a being or organism comes into existence. For example, certain material atoms are brought together, and man is the result. When this composition is destroyed and disintegrated, decomposition takes place; this is mortality, or death. When certain elements are composed, an animal comes into being. When these elements are scattered or decomposed, this is called the death of the animal. Again, certain atoms are bound together by chemical affinity; a composition called a flower appears. When these atoms are dispersed and the composition they have formed is disintegrated, the flower has come to its end; it is dead. Therefore, it is evident that life is the expression of composition, and mortality, or death, is equivalent to decomposition. As the spirit of man is not composed of material elements, it is not subject to decomposition and, therefore, has no death. It is self-evident that the human spirit is simple, single and not composed in order that it may come to immortality, and it is a philosophical axiom that the individual or indivisible atom is indestructible. At most, it passes through a process of construction and reconstruction. For example, these individual atoms are brought together in a composition, and through this composition a given organism—such as a man, an animal or a plant—is created. When this composition is decomposed, that created organism is brought to an end, but the component atoms are not annihilated; they continue to exist because they are single, individual and not composed. Therefore, it may be said that these individual atoms are eternal. Likewise, the human spirit, inasmuch as it is not composed of individual elements or atoms—as it is sanctified above these elements—is eternal. This is a self-evident proof of its immortality."

`Abdu'l-Bahá, The Promulgation of Universal Peace, p. 306

1 September 1912 
(excerpt from) Talk at Home of Mr. and Mrs. William Sutherland Maxwell
716 Pine Avenue West, 
Montreal, Canada