A piece of wall can be visually disintegrated from the whole into a separate triangle by plunging a diagonal of light from edge to edge on the wall; that is, side to floor, for instance.
“Praise God, from whom all blessings flow! Praise Him, all creatures here below! Praise Him above, ye heavenly host! Praise Father, Son, and Holy Ghost!”
“You can always tell a novice rider; they aren't comfortable in the saddle and have to hang on.”