Yi Jing, Oracle of the Moon

Lí-Duì, Fire-Marsh/Lake
    

   When LI activates Duì, differences come to light and it is important to clear up misunderstandings. Lake is both the joy of companionship and the fear of what people might do to each other. Or even what inner discord does. Li brings fences that keep safe or divide. Be careful with actions and enthusiasm, show only the ideas that suit the situation, then they will bring clarity and understanding.
  Duì is the trigram of exchange and empathy, but also of fights and enmity. A society of people will always contain both, so behave in a careful way, reckoning with the rules of relations. Secure your position, but without boasting. Bring in your ideas, but without compulsion.

This is the short answer - click for the complete one.

The initiative

    
The top line (Heaven-line) shows the change of the focus or initiative.
变上爻为震为雷, 云翳光明, 掩火不炎。
When the upper line changes it activates Zhen, the thunder. The clouds radiate light, like shielded fire which cannot burn anything.

The subject

    
The bottom line (Earth-line) shows the change of the field or subject.

  The bottom line is stationary yang. This line is the subject, or the ‘field’ where you pour in or find both the cause and the means for your initiative: space, material, helpers or other people, even food for thought. It is the line of the earth, of resources and realization. It is a 'receiving' line, the earth needs food to develop things.
  Here she is yang, she does not absorb or concretize, she is giving. Things look interesting and bright and give back. What you want to achieve inspires you, but take care not to deplete resources. Things will gain clarity but it is not yet a time of concrete results.
  Yang at the bottom line brings balance between yin and yang. Its light penetrates the undefined power of the earth-line, it inspires yin to make its imaginings grow, and it gives each creature or plan or venture its rightful structure.

Enjoy the now and its possibilities.

The outcome

    
The middle line (Man-line) shows the outcome.
  变九二为离为火。 离为火为日, 吐焰发耀, 光照天下, 太阳之三三 象，
长育之君, 万象贤明, 百物附丽。
  The change of the middle yang line activates Li, which is fire and the sun, spewing flames and brightly radiant; its rays illuminate everything under the sky, its image is repeated eminent yang.
  It is the ruler who brings greatness. The source of life and clarity for everything on Earth, all beings bind themselves to it.

  

  The three 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. They reinforce the overall power of a reading.

  Advice or help for the initiative: Zhen, Thunder with his energy and stimulation and quick actions.
  Advice or help for the subject: Gen, Mountain with his constancy, his ability to make things endure
  Advice or help for the outcome: Qian, Heaven, with his severe structure and his timing.
  But when things are not satisfying, it might be that one or more helpers don't help enough - or try too hard. Or maybe you don't listen carefully enough.