The mystical conception that all life is the divine light and the whole creation is made of that light, which is the light of God, has its evidence in all forms of creation. In the mountains and rocks there are not necessarily separate and detached rocks. This shows that in the mineral kingdom life evolves collectively. Evolution may show singleness in the vegetable kingdom, and as every tree may be called single, so every leaf, flower, and fruit may be called single. A flower may be called single, trees and plants attached together may be called single, such as reeds and grass. The development is collective, and yet it shows singleness.