Sculpture is like a journey. You have a different view as you return. The three-dimensional world is full of surprises in a way that a two-dimensional world could never be.
The idea for a series of upright motives resurfaced while he was working with Michael Rosenauer on a design for the English Electric Company Headquarters in London. Moore produced six upright motive maquettes and two maquettes for corner sculptures, as integral parts of Rosenauer's project. Although the design didn't win the commission, these maquettes became the impetus for the upright motives series.
Moore worked with architects throughout his career: Rosenauer, Charles Holden, Gordon Bunshaft and I.M. Pei amongst others. Moore considered, however, that in general his works' full potential was best realised within a natural landscape, thus making an architectural background a considerable challenge for him.
Assistant Curator, The Henry Moore Foundation
This seems to be almost religious in its symbolism