I once heard a fabulous parable for this..
There was once a king who hosted a grand banquet for his entire kingdom. People came from far and near to partake in the celebration. Among the people who came was a dear friend of the king.
After the celebrations were over, the king called over his friend and said, “Lets sit down to a small meal, just you and me. It doesn’t matter what we eat – we can even eat leftovers – the main thing is for us to spend some private time together.”
The first two seudos of Shabbos are compared to the grand banquet that the king made. Seudo Shlishis, which is the most elevated of all the Shabbos seudos, is where Hashem tells us, “I don’t care what there is to eat, I just want to spend some private time with you.”