1.
Training is doing your homework. It's not exciting. More often than not it's tedious. There is certainly no glory in it. But you stick with it, over time, and incrementally through no specific session, your body changes. Your mind becomes calloused to effort. You stop thinking of running as difficult or interesting or magical. It just becomes what you do. It becomes a habit.
Jack Edmonds
2.
The classes of problems which are respectively known and not
known to have good algorithms are of great theoretical interest. [...]
I conjecture that there is no good algorithm for the traveling
salesman problem. My reasons are the same as for any mathematical
conjecture: (1) It is a legitimate mathematical possibility, and
(2) I do not know.
Jack Edmonds
