What is important, then, is ...

What is important, then, is not that the critic should possess a correct abstract definition of beauty for the intellect, but a certain kind of temperament, the power of being deeply moved by the presence of beautiful objects.
 Walter Pater

Quotes from the same author

She is older than the rocks among which she sits; like the vampire, she has been dead many times, and learned the secrets of the grave; and has been a diver in deep seas, and keeps their fallen day about her; and trafficked for strange webs with Eastern merchants, and, as Leda, was the mother of Helen of Troy, and, as Saint Anne, the mother of Mary; and all this has been to her but as the sound of lyres and flutes, and lives only in the delicacy with which it has molded the changing lineaments, and tinged the eyelids and the hands.
 Walter Pater
Through the survival of their children, happy parents are able to think calmly, and with a very practical affection, of a world in which they are to have no direct share.
 Walter Pater
Many attempts have been made by writers on art and poetry to define beauty in the abstract, to express it in the most general terms, to find some universal formula for it.
 Walter Pater
Beauty, like all other qualities presented to human experience, is relative; and the definition of it becomes unmeaning and useless in proportion to its abstractness. To define beauty not in the most abstract, but in the most concrete terms possible, not to find a universal formula for it, but the formula which expresses most adequately this or that special manifestation of it, is the aim of the true student of aesthetics.
 Walter Pater
A sudden light transfigures a trivial thing, a weather-vane, a windmill, a winnowing flail, the dust in the barn door; a moment - and the thing has vanished, because it was pure effect; but it leaves a relish behind it, a longing that the accident may happen again.
 Walter Pater