Yi Jing, Oracle of the Moon

Lí-Gěn, Fire-Mountain
    

  When Lí activates Gěn, Fire has trouble to find nourishment. The Mountain, with his rocky heights, can be dangerous for fire, but he also lifts her high so that she shines far and wide. Then she spreads light, warmth and insight and benefits her wide environment.
  Mountain gives the elusive, ephemeral, and sometimes superficial fire stamina, extending her life beyond the moment. Fire gives back by revealing the stark beauty of Mountain to the outside world. Two lovers of the truth.

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.