I thought I would list this quote from an article I read called "Logotherapy and the Challenge of Suffering" by Viktor Frankl. (It was published in the Journal of Existential Psychiatry from 1961 I found at work!)
"...I dare say, man never, or at least not normally and primarily, sees in the partners whom he encounters and in the causes to which he commits himself merely a means to an end; for then he actually would have destroyed any authentic relationship to them." [italics his own.]
It sounds very Wojtyla-esque. I love the authentic ring of truth that has a certain radiance when psychology and theology harmonize.