Biology Direct.

It is correct to note that the transition from prokaryotes to eukaryotes was the most radical change in cell organization since life's origin with the largest ever burst of gene duplication and bio diversity. It is even more correct to note that the origin of self is self not wanting to be by itself and that the purpose of self also known as the meaning of life is companionship more commonly known as love.
~ Wald Wassermann, Physicist