between silence and light

between silence + light
craft
skill; dexterity (dictionary.com)

public/private
public - open to all persons
private - pertaining to or affecting a particular person or a small group of persons; individual (dictionary.com)

technique
the body of specialized procedures and methods used in any specific field, esp. in an area of applied science

language
communication of meaning in any way; medium that is expressive, significant, etc. (dictionary.com)

virtual
being such in power, force, or effect, though not actually or expressly such (dictionary.com)