"...I only ever come to the conclusion that a final knowledge of all viruses is simply impossible."

I absolutely agree. I also think that there are trillions, or even more viruses (individual particles, not species) in every human corpus. The vast majority of them are probably simply incidentally present, and have no infectious or pathogenic interaction with our bodies, because we ate something or breathed them in. Viruses aren't all pathogens. They're not alive. They don't eat or breathe, grow, or have any ability to reproduce themselves except as they are able to hijack life. It's actually likely in my estimation that some viruses are able to interact with non-living chemical processes to reproduce, but that's highly speculative, and just reflects the complexity of the universe.

It's just that some mechanisms exist that reproduce themselves, like a pantograph enables an image or item to be reproduced. The pantograph isn't alive, and the user isn't a pathogen.

"The theory of competition cannot exist without the theory of cooperation."

I also agree with this. I point out that life is an act of war because it helps me to dispel insuperable and irrational speculation regarding spirituality. It is clearly demonstrable that fungi and plants cooperate in the sharing of essential nutrients in ecosystems, for example. There is a network in the soil of mycelial hyphae and plant roots that trade sugar for various resources.

If a combatant has no allies, they are likely to lose, however.

All that being said, all life is one living thing, and each extant cell today is connected to that primordial life that originally became able to reproduce by an unbroken chain of living cells, each the daughter of it's parent. Every bacteria, tree, and person is so connected to that original cell. There is only one organism on Earth, it is immortal, and we are all part of it.

Be well.