What do I do in the main room?

Hint 1 of 12:

Listen to the Wise Old Man after you first enter.

Hint 2 of 12:

Note his focus on the door through which you just entered.

Hint 3 of 12:

Look around the main cave.

Hint 4 of 12:

Can you go back the way you came?

Hint 5 of 12:

Can you go forward to the statue?

Hint 6 of 12:

How many doors does that leave?

Hint 7 of 12:

Each of the remaining six doors leads to one of the six main caves.