A biography for Henri Poincaréhasn’t been written yet.
“If we wish to foresee the future of mathematics, our proper course is to study the history and present condition of the science.”
“How is it that there are so many minds that are incapable of understanding mathematics? ... the skeleton of our understanding, ... and actually they are the majority. ... We have here a problem that is not easy of solution, but yet must engage the attention of all who wish to devote themselves to education.”