Eight could just be the digit between seven and nine, or when you look closer, a symbol of infinity. Four, on the other hand, could be two plus two. But it could also stand for charavali i.e. the four aspects of the rising moon, from crescent to full moon. When kathak exponent Aditi Mangaldas worked on conceptualising a dance presentation titled 10X10 Bound by a Single Conceptual Thread, with her students at the Drishtikon Dance Foundation in Delhi, she steered them towards focusing on the latter.