Yi Jing, Oracle of the Moon

Qián-Duì, Heaven-Lake
    

  When Qián activates Duì, Heaven gives and Lake receives, Dui is exchange and persuasiveness. Heaven's severity shows the hard side of Lake’s interactions, the laws of social survival. The main currency is the power of words, spoken or written. Yang can only be contained within Lake by restraining itself, and one of the most important skills is finding the balance between speaking and silence, or persuading and letting go.
(The 'Lake' is rather a marsh, any wet place where animals and plants can grow.)

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.
九三变为兑泽。 小则为刚恶强硬, 大则为暴君酷吏, 惟谦恭自保, 则可免祸害之患也。
  Nine at the top activates the open Marsh. In the small there is strong evil, unyielding, in the big there are tyrants and oppressive officials, but through polite and modest self-confidence can one remain free from the worry of disaster.

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.