While I enjoy teaching people on the basic and intermediate levels to work them up to advanced levels, my real talent is for the advanced students. You could say that I'm like a ninth-degree black belt in martial arts. - Frederick Lenz


While I enjoy teaching people on the basic and intermediate levels to work them up to advanced levels, my real talent is for the advanced students. You could say that I'm like a ninth-degree black belt in martial arts. - Frederick Lindemann, 1st Viscount Cherwell