It demands an unflagging intellectual and physical vigour, a total immersion, which I had to be sure I could sustain with pleasure; for instance, I had to put off researches I had already begun.
Ito demands ng isang walang puknat intelektwal at pisikal na lakas, ng isang kabuuang paglulubog, na kung saan ako had sa siguraduhin ko ay umalalay sa kasiyahan; halimbawa, ako had sa ilagay off pananaliksik I had na sinimulan.