It begins at the table.
The host has prepared. This is the part that is invisible to the greedy guest but entirely visible to everyone else at the table. The food that is being served represents a calculation: this many people, this much food, a reasonable portion for each. The host has done the arithmetic and the arithmetic works, provided everyone at the table applies the same basic consideration to their serving.
The greedy guest does not apply that consideration.
They serve themselves first, or they serve themselves largest, or they reach for the dish before it has made its way around the table. They take the piece that everyone at the table could see was the best piece, the one that had been silently allocated by the collective gaze of the room to someone else or to no one yet. They go back for more before others have had their first. They finish the dish.
None of this is accompanied by any apparent awareness that it is happening. The greedy guest eats with the straightforward happiness of someone in a restaurant where the food belongs to whoever orders it. They have not made the mental adjustment that a guest at someone's table is required to make, which is the adjustment from I can have what I want to there is a finite amount of this and it is meant to be shared.
The greed is not always about food. There is the guest who takes too much of the drink that was intended for the whole table. The guest who monopolises the host's attention for the entire evening, consuming it as though it were a private resource rather than something being distributed carefully among several people. The guest who takes up physical space, spreading themselves and their belongings across a seating arrangement until the available room for others has quietly shrunk.
The host watches all of this and says nothing, because what can be said. The food is gone. The drink is lower than it should be. The evening has proceeded and the greedy guest has eaten well and feels entirely satisfied with the occasion.
The host will remember.
The greedy guest takes what is offered and more. The guest in the next chapter takes something that was not offered at all.