If you are playing on a cell phone, a subtle vibration will clue you in that danger is just a step above you. Otherwise, there is a "squeaky sound." If you are on the middle path, it means that you should turn left or right, but which one is unbreakable is based on the intuition of a player - a hermetic initiate. Each restart is a reincarnation of an initiate, meaning the life path will not be the same. That's why you can't rely on memorizing which step is unbreakable.
I hope this explanation gives you a better sense of the hermetic journey and game mechanic.