Full measure of meaning
Nowadays a round spot in a painting can be more significant than a human figure. A vertical line combined with a horizontal produce a sound that is almost dramatic. The impact of the acute angle of a triangle on a circle produces an effect no less powerful than the finger of God touching the finger of Adam in Michelangelo. And if fingers are not just anatomical or physiological but something more, so also a triangle or a circle is something more than geometry.