Feng Shui Date Selection

When it is said that Pi indicates there should be free course in what it denotes. We see the weak line coming and ornamenting the strong lines of the lower trigram, and hence it is said that ornament should have free course. On the other hand, the strong line above ornaments the weak ones of the upper trigram, and hence it is said that there will be little advantage, if ornament be allowed to advance and take the lead. This is illustrated in the appearances that ornament the sky. Elegance and intelligence denoted by the lower trigram regulated by the arrest denoted by the upper suggest the observances that adorn human society. We look at the ornamental figures of the sky, and thereby ascertain the changes of the seasons. We look at the ornamental observances of society, and understand the processes of transformation are accomplished all under heaven.
~ by King Wen translated by Alfred Huang

burial, medical