When I left Barcelona, staying in Spain was an important factor in my decision to join Madrid. I did not have to change country or learn a new language, adopt a different sort of lifestyle, and so on. ↗
The problem of distinguishing prime numbers from composite numbers and of resolving the latter into their prime factors is known to be one of the most important and useful in arithmetic. ↗
Like all social theories, internationalism must seek its basis in the economic and technical fields; here are to be found the most profound and the most decisive factors in the development of society. ↗
There are a whole lot of historical factors that have played a part in our being where we are today, and I think that to even to begin to understand our contemporary issues and contemporary problems, you have to understand a little bit about that history. ↗