Style... the very hall-mark of great art... there is little use in trying to define style. - Ernest Flagg

When, in architecture, one uses a fixed unit and combinations of it, to produce harmony, the effect should be most striking and apparent... as it is in music by the measured beat and in poetry by the cadence and rhythm.

Reason...to suppose any production, worthy to be called a work of art, can be made without its use is foolish. ...By the use of reason many mistakes in design may be avoided and many counterfeits of art readily detected....Beauty alone is an excellent reason for many things, but when a design is in direct conflict with common sense it cannot be a work of art.

For more than two thousand years architectural design by the use of a modulus, except in the case of the classic orders, had been a lost art.