Beauty depends on size as well as symmetry. No very small animal can be beautiful, for looking at it takes so small a portion of time that the impression of it will be confused. Nor can any very large one, for a whole view of it cannot be had at once, and so there will be no unity and completeness. – Aristotle

Beauty ought to look a little surprised: it is the emotion that best suits her face. The beauty who does not look surprised, who accepts her position as her due – she reminds us too much of a prima donna. – E. M. Forster