Do a quicksave before you drink Soulgreep. When you are in the Temple Of Sacrifice, there is no way out unless you are successful with the answers. The game ends if you are wrong.
In the temple, enter the room with the depicted hangman. Make sure to enter the correct room by checking what your character says when he enters it. Use all three altars. The correct combination is:
Love Rephen, the blacksmith of destiny Dahn-en-nyan, soul-beare