"Putin did not head the KGB, never has. Putin was a mid-level nobody there. Putin was one of those guys in the KGB who was a climber. He was forever hoping, climbing that ladder, trying to get to the head spot."

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It is possible for a mathematician to be "too strong" for a given occasion. He forces through, where another might be driven to a different, and possible more fruitful, approach. (So a rock climber might force a dreadful crack, instead of finding a subtle and delicate route.)

— John Edensor Littlewood