Pointing a finger a means to direct us to visualise the invisible.

1. deitic =elating to or denoting a word or expression whose meaning is dependent on the context in which it is used (such as here, you, me, that one there, or next Tuesday ).

noun deitic

Deictic gestures (finger pointing) in images point at remote phenomena and absent features; both of them designate a reality; both of them forces us to transcend the setting in which we are immersed


'finger pointing'  gestures help us see things that are invisible, and yet they are completely different in their definition of absence, presence, reality, phenomena, transcendence, visibility, invisibility, opacity and transparence.