“Architecture tends to consume everything else, it has become one's entire life.”
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The primary factor is proportions.
In addressing a task, one almost always has several possible options, sometimes only a few, and they may all be practical and functional. But they lack the aesthetic aspect that raises it to architecture.
When I travel, I draw and paint sketches which is great fun. And as long as you are fully aware that it has nothing to do with actual art, I think that's all right.
Proportions are what makes the old Greek temples classic in their beauty. They are like huge blocks, from which the air has been literally hewn out between the columns.