Yi Jing, Oracle of the Moon

Zhèn-Zhèn, Thunder-Thunder
    

  Zhènzhèn means “benevolent and generous”. Zhen or thunder (the voice of Heaven) not only brings Heaven's law to the earth, but also gives creatures the energy and impulse to start their existence (the yang bottom line). Zhènzhèn is the thunderstorm in the mountains, echoing from all sides, but also the thunder and rain that soak the earth in spring, wake up the seeds and help them to grow. Zhèn's way to open up the earth with shocks can be devastating, but it also makes new space and ploughs up new fertile ground.

This is the short answer - click for the complete one (with 'your' helpers).

  About the 3 lines of the trigrams and the 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.