When I shoot, I look not for things to make pictures of, but for the effect of light itself on things. I was drawn to the sidewalk shadows created by a row of columns, and the rhythmic rays of light that fell between them. These repeating diagonal lines could draw the eye into a scene. But what scene was there to draw the eye to? I solved that problem by moving my position until there was more space between the two columns at right than anywhere else in the picture, and then waited for people to pass into and through that space. I was very fortunate – within a few minutes, two people entered that space, walking together, step for step. Their back legs formed rhythmic diagonals that echoed the diagonal play of light and shadow in the foreground. The image became more than just expression of form and rhythm. It expressed a bonding process that makes two people into one – the rhythm of life itself.