Yi Jing, Oracle of the Moon

Qián-Zhèn, Heaven-Thunder
    

  When your Zhèn (Thunder) enters a situation dominated by Qián (Heaven), the structure and strength of heaven connect with thunder's direct, transformative power. Your intentions call upon the universe and things happen magically - or so it seems. Scientists are discovering in this century what shamans and mystics have known for thousands of years.
  Thunder is the wake-up voice of heaven, but it does much more than sound, it rattles and shakes and shocks into life what lay dormant. Seeds wake up, and so do the seeds of your ideas and wishes. They listen to Heaven and answer through Thunder, with a language that is stronger and more true than thought. This exchange of Heaven and Thunder is what gives nature her endless diversity and energy, and this is what shapes your identity. It brings all species to health and perfection.

This is the short answer - click for the complete one with the spirit helpers.

  About the 3 lines of the trigrams and the spirit helpers:
  Each line, active or at rest, summons one of the 8 trigrams as a Helper. For an activated line: telling you what you need - or about a problem area or something to avoid.
  For a stationary line: this is what you already have or do or what you don't need. Often we just need a reminder of our abilities. Or it could be what you wish or fear - but will not happen.
  Active lines are the helpers to change things, they listen to intentions, which can come from you, surroundings, or fate. Stationary helpers are part of the core meaning, they are your soul talking, but they also see the impossibilities or what is lacking at the moment. They reinforce the overall power of a reading.