Design as part of the Kosmokalindar 2018
C.G. Jung had some pretty neat ideas about the squaring of the circle and the nature of four.
Also, the Rhombus is a pretty neat symbol.
Because rhombus contains vertical and horizontal directions simultaneously, we can say that is the symbol of the unification of matter and spirit. Unites heaven and earth, the direction of elevation, aspiration to divinity and horizontally material oriented.
Because peaks represent the extremities of the cross, may be a close and direct connection between the two symbols.
Read more about it here, but it’s just an example.