This is an extremely easy application to use in casting the "I Ching". Just hold your question in mind for at least 9 seconds while you press on the symbol of the Tao and it will spin out to create your opening hexagram. The comments on the lines are from Legge's well known interpretations, which can seem a bit obscure to a Westerner. But the longer you use this Ap the more you begin to internalize the meaning of the lines, and so when they appear you will soon get a strong intuitive feeling about the answer reflected by the hexagram. The changing lines can then be easily looked up by consulting the hexagram index. (It would have been nice to get the hexagram resulting from the changing lines with one tap, but the programming for this can get somewhat complex, with 4096 possibilities! As it stands, Yjing Navigator is elegantly simple,and produces some uncanny results when the hexagrams seem to directly speak to your question...But then again, it is only tapping into the eternal energy of the I ching itself. I'm glad I bought this.