Murphy explicitly states that the 64 hexagrams correspond to 64 specific mental states (e.g., tension, peace, conflict, union). By casting the coins or yarrow stalks, you are not asking "What will happen?" You are asking "What mental block is currently hidden in my subconscious?"
Here are some interesting insights that you might find in Joseph Murphy's work on the I Ching: secrets of the i ching joseph murphy pdf better
Disclaimer: This article is for informational and educational purposes. Please respect copyright laws when seeking digital copies of "Secrets of the I Ching" by Joseph Murphy. Introduction Murphy explicitly states that the 64 hexagrams