The key is light

and light illuminates shapes

and shapes have emotional power.

By the play of proportions

by the play of relationships

unexpected, amazing.

But also by the intellectual play

of purpose :

their authentic origin,

their capacity to endure,

structure,

astuteness, boldness, even temerity, the play

of those vital abstractions which  are the essential qualities

the components of architecture.

Le Corbusier   1953

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