Theartof painting cannot betrulyjudgedsave bysuchas are themselves good painters; from others verily it is hidden even as a strange tongue.

-Du« r er, Albrecht
c.1512  Quoted in William Martin Conway Literary Remains of Albrecht Du«  rer (1889).

The Hidden Persuaders.

-Packard,Vance
  Title of a book on advertising.

But there is yet another form of this hidden heresy, and, paradoxically, it can affect those who are proudest of their long-standing and unimpeachable orthodoxy; heresy in the form of indifference.

-Rahner, Karl
  'Natur undGnade'in Fragen derTheologieHeute (translated by DinahWharton as Nature and Grace,1963).

Hidden in wonder and snow, or sudden with summer, This land stares at the sun in a huge silence Endlessly repeating something we cannot hear. Inarticulate, arctic, Not written on by history, emptyas paper, It leans away from the world with songs in its lakes Older than love, and lost in the miles. 722

-Scott, F(rancis) R(eginald)
  Of Canada.'Laurentian Shield'.