“it must be admitted that parallel with the division of the already formed cells there continued throughout the ages the development of cells from protoplasm, and living protoplasm, too, continued to be formed and to develop from inorganic matter” CellsInorganic To OrganicProtoplasm Book:The Origin of Cells Source: The Origin of Cells
“there is a countless number of the simplest formations, viruses, which evidently stand on the border-line between the living and the non-living.” LifeCellsInorganic To Organic Book:The Origin of Cells Source: The Origin of Cells