A new film made by Sachs and his frequent collaborator Van Neistat for Nike that traces the path of an apprentice in the artist’s storied SoHo studio. The indoctrination process is harsh and unstinting, with physical as well as mental endurance a topmost priority. “It is by will alone I set my mind in motion,” Sachs has his aspiring studio hands repeat in a sort of mantra in the film. Another one intoned: “Power tools are a privilege, not a right.”