Look not on his countenance, or on the height of his stature; because I have refused him: for the L seeth not as man seeth; for man looketh on the outward appearance, but the L looketh on the heart.

-Bible (Old Testament)
ORDORD1 Samuel16:7.

In youth Beatrice had been attractive, but what was attractive about her was not her appearance but her disposability.

-Brookner, Anita
  Falling Slowly.

La femme†sait que quand on la regarde on ne la distingue pas de son apparence: elle est juge¤  e, respecte¤  e, de¤  sire¤  e a'   travers sa toilette. Woman†knows that when she is looked at she is not considered apart from her appearance: she is judged, respected, desired, by and through her toilette.

-de Beauvoir, Simone
  Le Deuxie' m e Sexe (The Second Sex), bk.2, pt.7, ch.25 (translated by H M Parshley,1952).

Wit, you know, is the unexpected copulation of ideas, the discoveryof some occult relation between imagesin appearance remote from each other.

-Johnson, Samuel known as Dr Johnson
^2  In The Rambler.

Garde-toi, tant que tu vivras, De juger des gens sur la mine. Beware as long as you live, Of judging others according to appearance alone.

-La Fontaine,Jean de
  Fables, pt.6, no.5,'Le cochet, le chat et le souriceau'.

Political language†is designed to make lies sound truthful and murder respectable, and to give an appearance of solidity to pure wind.

-Orwell, George pseudonym of  Eric Arthur Blair
  'Politics and the English Language', collected in Shooting an Elephant (1950).

Concerning the gods I am not in a position to know either that they are or that they are not, or what theyare like in appearance; for there are many things that are preventing knowledge, the obscurity of the matter and the brevity of human life.

-Protagoras
Quoted in G B Kerferd The Sophistic Movement (1981), ch.13.

In science men have discovered an activity of the very highest value in which they are no longer, as in art, dependent for progress upon the appearance of continually greater genius, for in science the successors stand upon the shoulders of their predecessors; where one man of supreme genius has invented a method, a thousand lesser men can apply it.

-Russell, Bertrand Arthur William Russell, 3rd Earl
  A Free Man'sWorship and Other Essays.