He must be able to weigh up a problem, or an opportunity, in an dispassionate way, on its terms (as well as his own), and to select, arrange, and dispose his decisions accordingly. He must be able to thrive on constraint and to turn every opportunity to good account. He must like and understand people and be able to treat with them; he must be able to accept fairly complex situations in which he may well be working as a member of a team. He must ne reasonably articulate. He must be practical and prepared for extensive responsibilities to other people.