It assigns 2 different meanings to the word "better":
(1) All things of higher value than eternal bliss amount to an empty set.
(2) Simple bread forms a set of higher power than an empty set
Therefore, demagogically, Simple bread is more than eternal bliss.
It compares apples with oranges. First, it compares the elements of 2 sets by value. The second comparison is by power. This cannot establish transitive property.