Final cause; end; purpose of obtaining; cause; motive; reason; interest; concern; account; regard or respect; -- used chiefly in such phrases as, for the sake of, for his sake, for man's sake, for mercy's sake, and the like; as, to commit crime for the sake of gain; to go abroad for the sake of one's health.
My best friend is the man who in wishing me well wishes it for my sake. Aristotle
There is always the danger that we may just do the work for the sake of the work. This is where the respect and the love and the devotion come in - that we do it to God, to Christ, and that's why we try to do it as beautifully as possible. Mother Teresa