To be is to be in connection with something, and without such a connection there is no life.
What do we mean with the close connection?
It is a mutual active challenge and reaction between two humans, between an I and a Thou, the challenge which the Thou gives from itself, and which the “I” takes up, or whereon the “I” reacts, and also the challenge which the “I” gives from itself to the Thou, the challenge from the I to the Thou.
The challenge and the reaction give themselves expression in language as question and answer.
In this way life gets in language a dialogical character.