May 4

Thus this flower once upon a time was of the soil. The animal eats the flower or its fruit, and it thereby ascends to the animal kingdom. Man eats the meat of the animal, and there you have its ascent into the human kingdom, because all phenomena are divided into that which eats and that which is eaten. Therefore, every primordial atom of these atoms, singly and indivisible, has had its coursings throughout all the sentient creation, going constantly into the aggregation of the various elements. Hence do you have the conservation of energy and the infinity of phenomena, the indestructibility of phenomena, changeless and immutable, because life cannot suffer annihilation but only change. 
- ‘Abdu’l-Baha  (from a talk, ‘Foundations of World Unity’; compilation ‘Nature’, prepared by the Research Department of the Universal House of Justice)