If I don't do that with the bottles, then I sit down, I could be thinking of something else. If I do always the same things, it means that I am focused and I'm alert to think purely about tennis.

What we've done all of these years is very simple, is use the little tool, which is ask three whys in a row. Because the first why you always have a good answer for. The second why, it starts getting difficult. By the third why, you don't really know why you're doing what you're doing.

I don’t lead by force, I lead by example. And if I can, set a good example. If I can set an example to my staff and my group, by being punctual, I come to work every morning, walk onto the hospital floor within two or three minutes of the same time every day, and they can depend upon it.

All my life, I've gone through life anticipating trouble. And here I am, well along on my eighty-fourth year, and like Epictetus, I've had a favored life. It didn't make me unhappy to anticipate trouble all the time and be ready to perform adequately if trouble came. It didn't hurt me at all. In fact, it helped me.

I share Alfred Nobel's conviction that war is the greatest of all human disasters. Infectious disease runs a good second.

I tried for a Ph.D. scholarship to work with Cedric Mims, but was told to apply again later because he already had a "scholar" and would take only one student at a time. … The following week a job in the Department of Experimental Pathology at the Moredun was advertized in Nature. We sailed for Britain in early 1967, on a very slow and cheap ship.

On returning to Brisbane, I realised fairly quickly that I am an experimentalist at heart. A career as a diagnostic virologist was not for me!