“Every kind of creature is developed by the exercise of its functions. If denied the exercise of its functions, it can not develop in the fullest degree.”— Charlotte Perkins Gilman
“I turn with terror and horror from this lamentable plague of continuous functions with no derivatives.”— Charles Hermite
“A system just does what it does. It can't be blamed for that. It is structured to do what it does, and that's all.”— Donella Meadows
“Only a very small part of architecture belongs to art: the tomb and the monument. Everything else that fulfils a function is to be excluded from the domain of art.”— Adolf Loos
“The least obvious part of the system, its function or purpose, is often the most crucial determinant of the system’s behavior.”— Donella Meadows