Explain the The Lysogenic Cycle in diversity of life?

The Lysogenic Life History of Bacteriophage Viruses. Even though viruses are structurally simple, consisting of merely a nucleic acid encased in a protein shell and a few enzymes, they interact in a complex way with living organisms, leading to a very involved relationship with living things. In fact, they are able to prey upon living cells by infiltrating or disrupting the living cell's DNA. The viral DNA (or RNA, if it's a retrovirus) virtually takes control of the host cell by altering the normal functioning of the cell's DNA. The virus will then insert its own DNA into the cell's genetic instructions, and cause the cell to manufacture viral components. As such, viruses are only able to reproduce by "commandeering" a host cell.

This begs the question: if viruses are able to reproduce by using living cells, are they themselves not living to some extent? It would therefore seem that viruses are definitely closely related to life, if not actually living. However, many biologists consider viruses to be nonliving because they cannot independently reproduce nor do they possess the other characteristics of life. At one time biologists considered viruses to be forms that are halfway between living and nonliving. Most now believe viruses to be, evolutionarily speaking, leftover fragments of genomes (the genetic complement) of living organisms.