62 Dear Audie, Thank you. A teacher’s worth is measured by how much he can give to his students, and for years I’ve given very little. I learned from Edgar’s experience to keep silent. Because of his other accomplishments in science, he expected his colleagues to be respectful, if not enthusiastic, about his other discoveries. Instead he was met with doubt at best, but more often ridicule. It changed him in ways I did not want to change. So I kept my discoveries to myself. But now I can tell you what I’ve learned: that a rising tide lifts all boats. Edgar and I visited countless other men and women tied to the same threads that we were. What we saw was that when one triumphed, we all did. When one despaired, we all did. Haven’t you ever felt suddenly sad or happy for no apparent reason

