My dear son:—
The doctors have left and I am told that in a few hours I shall die. In my lifetime the world has progressed from the chaotic turmoil of the early Atomic era to the peacefulness and tranquility of our present age, and I die content.
For ten years I have instructed you in all that you will need for the future. One final lesson remains to be taught.
On the wall of my bedchamber hangs a citation "from a grateful government...
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