"You have to ask yourself the question 'Who am I?' This investigation will lead in the end to the discovery of something within you which is behind the mind. Solve that great problem and you will solve all other problems."

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I have to keep going, as there are always people on my track. I have to publish my present work as rapidly as possible in order to keep in the race. The best sprinters in this road of investigation are Becquerel and the Curies.

— Ernest Rutherford