Willem Kolff: The exciting thing, of course, is not so much what people say about it, but to see somebody who is doomed to die, live and be happy. I got a letter three days ago from a woman who I’ve never seen. And she wrote me, “Dr. Kolff, I’ve been on dialysis for 18 years. You see here a picture of myself with my first grandchild. I’ve had a very rich life, a very full life, and thank you very much.” That is the reward, that of course makes you [feel] very good. And, that also sustains you to not pay too much attention to the detractors of what you’re doing.