end in itself

end in itself

A purpose or goal desired for its own sake (rather than to attain something else). For example, For me, writing books is an end in itself; they don't really make that much money. This expression employs the noun end in the sense of "final cause or purpose," a usage dating from the early 1500s.
See also: end, itself
References in periodicals archive ?
The ever-present danger is that technical expertise becomes an end in itself.