The lines of hexagram 31

  Xian, the name of 31: the ideogram is a weapon and a mouth, meaning "to bite", to hurt with the mouth. For wooing, one of its translations, you have to make a strong impression with your mouth: advertising yourself. Being a good kisser seems to help as well. There are many situations in which you need self-advertising.
  Judgment. 'Grasp a woman' or get a wife? Maybe similar results back then.
  Great image. Marsh or lake.
  Line 1. Big toe or thumb.
  Line 3. Or maybe: If one has a sensation in one's thigh, one should hold on to (what follows:) the lower leg. Persionally I think the thigh is what 'kicks'. A knee-jerk reaction which might hurt the 'follower', or make him kick back, or make a lot of things follow your action, bringing trouble. Let it go, apologize, stop it from escalating.
  Line 4. The character for 'your' is a balance, meaning maybe 'balanced' thoughts instead of 'your' thoughts?

More about hexagrams 31 and 32
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