Certain ideas are good
certain hours are pleasant.
Certain days are lovely.
Certain images are wonderful.
The certain could be less or more
usually does not denote a more
Certain could also mean definite
at times could point to an infinite.
Certain plays a role in a way
could be for better or worse in ways
Certainly I would for certain
proceed in a direction certain.
So much for certain
as it is in a way certain
great to be certain