The very hardest thing about coaching at the college where I work was that most of the students who populate the program are either undisciplined athletes or non-athletes. Great kids, to be sure, but by and large not athletes. I worked so hard not only at teaching them how to row but also at imparting the joy that can be found in training our bodies, how to think about sport, and the thrill of competing to win. And while I know I taught them how to row, I've never believed I got much farther than that.
After I resigned as their coach, I emailed my athletes hoping they would respect my decision and not hold against me the fact that I quit in the middle of the year, but not much more than that. What happened was so unexpected and so gratifying, it took my breath away: more than one of my rowers (and one former rower) has emailed me to tell me I taught them "what it means to be an athlete"(emphasis mine).
Learning this from them has absolutely blown me away. I can think of no higher compliment nor any greater return on the love that flowed from me to them all these years.