How can I get into the closet past the screening door

Hint 1 of 7:

Consult the guide about intelligence.

Hint 2 of 7:

You must impress the door with your Zen nature.

Hint 3 of 7:

Anyone can have no tea.

Hint 4 of 7:

Some can manage to get tea.

Hint 5 of 7:

Only you can (and must) have both tea AND no tea.

Hint 6 of 7:

Also, you must not have a particle of common sense in your brain.