Walking is the human pace — the speed at which the world was designed to be received by the senses and at which the mind most reliably produces its best thinking. Nasreddin walked everywhere, partly because his donkey had its own schedule, and partly because the distance between two places was never simply geographic. Every great philosophical tradition that produced walkers — the Peripatetics, the Sufis, the Zen monks — noticed the same thing: movement and thought are not separate activities.
Each step builds on the last.