“An author who composes while walking, on the other hand, is free from such bonds; his thought is not the slave of other volumes, not swollen with verifications, nor weighted with the thought of others. It contains no explanation owed to anyone: just thought, judgement, decision. It is thought born of a movement, an impulse. In it we can feel the body’s elasticity, the rhythm of a dance. It retains and expresses the energy, the springiness of the body. Here is thought about the thing itself, without the scrambling, the fogginess, the barriers, the customs clearances of culture and tradition. The result will not be long and meticulous exegesis, but thoughts that are light and profound. That is really the challenge: the lighter a thought, the more it rises, and becomes profound by rising – vertiginously – above the thick marshes of conviction, opinion, established thought. While books conceived in the library are on the contrary superficial and heavy. They remain on the level of recopying.”