"Tell me, what's heavier-a kilo of iron or a kilo of wool?" I felt myself growing tense, I was sure it was a trick question, but be fore I could stop to think it through, I had blurted out,
"Iron."
"Think again," he said, with a smirk. "Think again, my boy. One kilo of a heavy substance is the same weight as one kilo of a light substance." He tapped my head with his ruler and said, "Can't be weak everywhere, eh? If the body's weak, the mind must be made stronger!" I must focus on developing my mind by learning chess, he said. "Alekhine, Tarrasch, Capablanca! Great minds in ailing bodies, all of them."