To solve the Celestial riddle please follow these steps:
(most questions are at the archive so I post it here for next users who need help)
You start with 3 closed Gates and one open gate number "3".
You need to put all 4 stones around these Numbers:
Room 1 (the open one at the left) - place the stones around the 3 - opens Gate 7
Then go through the Gate 7 to the next room .....
Room 2 - place the stones around the 7 - opens Gate 4
Then go through the Gate 4 to the next room .....
Room 3 - place the stones around the 4 - opens the blank Gate
Then go through the blanc Gate to the next room and finish Duty...
cheers & have fun