Future is going to past when it is old

Future is going to past when it is old (not useful), past is going to future when it is useful (modern way).

Present is going to past when it is old, otherwise present is going to future when it is new.

Old and new both are needed when the time comes to useful those.

Take an example of thing or information to understand better with different situations at different times.

Tradition (past) goes to future (some change will happen also)

Modern (future) goes to past (new situations will happen to change)

-- Still need more explanation / discussion to understand!