Our job, although very stimulating, was poorly paid. It was quite easy to obtain a salary twice as high in industry and also be alloted a flat, which in those days of the acute housing problem mattered a great deal. We turned to [mathematician] Professor [Kazimierz] Kuratowski [the director of the Institute of Mathematics in Warsaw] with our grievances. He answered that “low salaries are a severe but necessary test of a genuine dedication to science of young research workers. If the salaries were high, what sort of people would we get here?” His arguments were not entirely convincing for us, but of course no one quit the Institute we adored. It should also be added that, some time later, some of us, already “tested,” were allotted the flats we and our families had dreamt about.
Reminds me of Randy Pausch saying
But remember, the brick walls are there for a reason. The brick walls are not there to keep us out. The brick walls are there to give us a chance to show how badly we want something. Because the brick walls are there to stop the people who don’t want it badly enough. They’re there to stop the other people.
(A transcript of Pausch’s lecture is here.)