The relationships between them have not necessarily any reference to what is practical or descriptive. They are a mathematical creation of your mind. They are the language of Architecture. By the use of inert materials and starting from conditions more or less utilitarian, you have established certain relationships which have aroused my emotions. This is Architecture.
Architecture means plastic invention, intellectual speculation, higher mathematics.
Architecture is a very noble art. You employ stone, wood and concrete, and with these materials you build houses and palaces. That is construction.