hard

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 breathe on this terrestrial ball. What is it?
Common Wrong Answers
“Yesterday”
Yesterday refers to a time that has already passed and can be remembered, whereas the riddle describes something that never was and is always in the future.
“Today”
Today is a present reality that people experience and can see, contradicting the riddle's statement that the answer has never been seen.
“Dreams”
While dreams can be elusive and often relate to the future, they are subjective experiences that individuals can have, unlike tomorrow, which is a universal concept that is always forthcoming.