Captive, truth, sincerity, inspire confidence.
The tag of hexagram 61 is Zhong Fu, inner truth. The character fu appeares 42 times in the Zhou Yi.
Originally it meant captive. It is a picture of a child and a claw: grasping a (small) person.
When the troops returned home, they had to show their conquests. They did it by showing the captives or the number of killed enemies.
Hauling along corpses for a long journey home is not a good idea, so they only brought the ears.
The ears brought home were proof that they told the truth. So the character started to mean truth, sincerity, inspire confidence.
The number of people is still sometimes counted in ears: six ears: three people.
In hexagram 55 line 2 it says: "To proceed brings doubt and anxiety. With confidence Fa gathers." (Fa is the personal name of Wu, king Wen's son).
Wu 'has the power to inspire', he convinces his people and the allies that the eclipse is not a bad sign, on the contrary. It is an omen of the fall of an empire - the Shang of course...