QED

Speed means nothing. Math doesn’t depend on speed. It is about deep.

Yuri Burago, de promotor van Grigori Perelman, over zijn student in het artikel Manifold Destiny van Silvia Nasar en David Gruber: “There are a lot of students of high availability who speak before thinking. Grisha was different. He thought deeply. His answers were always correct. He always checked very, very carefully. He was not fast.”