Sign

ho anax, hou to manteion esti
to en Delphois, oute legei oute
 kruptei,
alla sêmainei

Heraclitus, DK 22 B 93,
Kahn XXXIII:

The lord whose oracle is
at Delphi neither reveals nor
 conceals, but gives a sign.

A sign, perhaps of the sort
given by Apollo’s oracle:

Road sign with double arrow pointing both left and right

Click on the sign for further details.

Related material:

This week’s New Yorker

Cartoon sign-- enlightenment one way, sandals the other

… as well as   
  today’s previous entry —
Symbol,” discussing Apollo
and a web page
by Nick Wedd —
and Wedd’s home page,
which states that
“I have now found a
  source of Polish sandals.”