Praise and Worship = INTIMATE, PERSONAL KNOWLEDGE (a relationship!)
Accurate Knowledge = Intellectual Knowledge, from reading "about" someone or something. (Ask the Pharisees about this one. They had lots of it.)
Example: A sports fan has a favorite baseball player. He reads all kinds of facts about this person. Knows all his statistics. Collects his memorabilia. Etc....
This same baseball player has a son he adopted. The kid hangs out with him, eats dinner with him, talks directly to him every day.
Which of the two REALLY knows the baseball player? The guy who has a bunch of books about him, or the kid who is with him every day and is a member of his family?
How do you know Jesus or Jehovah? Do you talk to them every day?
It's good to know the facts straight from the Bible, but it doesn't help at all if you don't have the relationship!