In the introduction to his tractate De oratione Evagrios Pontikos speaks of figures that are “triangles”, “squares”, and even “spheres”. These remarks are less cryptic if one regards the numerical systems used in late antiquity. However, they may hint at a hidden structure within De oratione. Selecting all chapters whose numbers are “triangles”, or “squares” respectively, etc., we find chains of sayings which follow certain themes woven into the “fabric” of the tractate. This discovery reveals again Evagrios as the master of literary composition.