Manipulation of DNA by cells?

Do these processes, that deliberately alter the structure of the genome, indicate in some way a purposeful process?

My question is are these "library" of antibodies binding to a pathogen in a random manner or some type of directed manner?

When you say "selected for" are you saying these are directed functions for fitness?

Shapiro in his book "Evolution: a view from the 21st century", defines natural genetic engineering as follows:"The collective set of biochemical capabilities that cells have to restructure their genomes by cleaving, splicing, and synthesizing DNA chains. much as we do in modern biotechnology."It seems to me that they are both describing the same process.I am very much amazed that even though the process is said to be random, it appears that it is in fact a process that places the necessary genes where they are needed. Am I way off base on this?The wiki artice says "nearly randomly combines..."
Why the "nearly" observation? Is it more than random?

Is your numberplate going to give you access to the computer site that requires a password?It seems the random genes will give the needed access.

When you say "chances are..." is that a random chance or is the body in some way "programmed" to recognise the pathogen?Programmed may be a bad choice of words, but it is the best I can come up with at this time.Also how does the body then produce the necessary antibody? It would seem that this could not be random, but "programmed" in some way.I am not trying to be difficult. I think you may know my philsophy, that of "Creation Continium" per the Roman Catholic church, and that there is in fact a cause for all these wonderous events.