Know Me Never See Me

Riddle: I never was, am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, To live and breath on this terrestrial ball. What am I?

Answer: Tomorrow or the future. Source: https://www.riddles.com/1542

I never was, am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, To live and breath on this terrestrial ball. What am I? — Know Me Never See Me by Anonymous Riddle