The more our knowledge advances the more difficult it becomes to define the meaning of life. He we are mostly concerned with life in this biological aspects, rather than the life of the spirit, in which we are more on religious grounds.
Living systems show certain characteristics which set them apart from nonliving organisms. Higher forms of life have additional qualities like feeling, thinking and social behavior. They react in more complicated ways to external stimuli. They have an extended awareness of their environment and react in more variation to the challenges of the environment.
The individuals who are successful in overcoming the obstacles of existence, have the best chance to survive. The life-experiences gained become new elements in the restructuring of the basic components of the sell, so that individuals will produce an offspring that is more adapted to the environment. New mutations are the result.
Darwin has grasped the significance of this trait of life on which he developed his theory of evolution. This theory says that the higher forms will evolve from lower forms if given enough time. It goes even so far to say that time is the only factor is required to transform dead matter info, living organism.
With the arrival of the computers, the distinction between living and nonliving organism become more blurred as computerized robots show capabilities closely resembling that of animals, except that of reproduction and natural growth.
Esoteric sources of information state that life is actually a force that exists separately from the organism. It is a force like that found in electricity, magnetism. This life-force is a divine gift to a planet that is ready to receive it. The theory of evolution has been stretched too far by claiming that time can convert dead matter into living organism. This in itself is against science.