For 實, what semantic notions underlie wealth and fullness of heart, with trueness?
The character 實 depicts &quot;money in a house&quot;, originally meant 'rich'
Now imagine two houses, One is a rich house full of valuable items and the other is a poor house that has nothing, is empty.
Now replace the two houses with two wine bottles. One is filled with wine, and the other is empty. The one with wine is honest, trustworthy because it has content, the empty bottle on the other hand, is simply empty.
Now imagine two person's words. One's words are filled with substance and the other's words are empty --  The one that is filled with substance is considered honest, and the empty one is considered the opposite
That's how 實 acquired the meaning of veracity -- there are contents inside