Not giving up, and as I say, this is a corny word, but hard work. Again, not as a sacrifice. I liked it. It was what I wanted to do. I never thought, my gosh, now I have to go back to the laboratory. That’s where I wanted to be. Nevertheless, that’s where I was and it was hard work. Working, doing research nearly all of my waking hours. I took time out to go to the movies and dancing. I went to the city where the big bands were playing in those days with girlfriends and so forth, but my number one priority was to do the research and work out the problems and get the results and interpret it and write papers and write review articles and so forth.