Dirac siempre comentó que su relación con su padre Charles nunca fue fácil. A partir de 1925, año del suicidio del hermano de Dirac, Reginald, padre e hijo se distanciaron aún más. Leo a Schwber, QED and the Men Who Made It:
Reginald, Paul"s older brother, had wanted to become a physician, but Charles forced him to study mechanical engineering at Bristol. He obtained only a third-class degree upon graduating and accepted a position as a draftsman with an engineering firm in Wolverhampton. He committed suicide when he was twentyfour years old. The death of his oldest son deeply disturbed Charles, and for a while Paul feared that his father might lose his sanity—and he resolved that he would never take his own life no matter what the circumstances. Thereafter Paul"s relationship with his father became chilled and they had very little interaction with one another. One manifestation of Paul"s feeling toward his father was that throughout his life he avoided going to Switzerland, a country he associated with his father (Mehra and Rechenberg 1982). Paul invited only his mother to attend the ceremonies in Stockholm honoring him with the Nobel Prize in 1933. Dalitz and Peierls report that when Professor Tyndall, who had headed the physics department at Bristol University for three decades, gave a set of public evening lectures on modem physics in the early 1930s, he noticed a regular listener in the front row, a man much older than the others there, who was taking careful note of all that he said. At the end of the last lecture of the series, this old man came up to him to thank him, saying: "I am glad to have heard all this. My son does physics but he never tells me anything about it." The old man was Charles Dirac. Charles Dirac died in 1935. Paul was in Russia at the time to watch an eclipse of the sun; when infomied of the seriousness of his father"s illness, Paul flew back to England, but it was too late. The first letter he wrote his wife after his father"s death was to say, "1 feel much freer now" (Margit Dirac 1987, p. 5).
No conocía la anécdota del padre tratando de conocer física. Debió ser duro para él encontrarse en la madurez, sin sus hijos. Dirac siempre tuvo una conducta lejana, sin grandes relaciones, con excepción de su esposa (recordemos que era la hermana de Wigner).
Angel "Java" Lopez