If it is true that...

A quiddity or form that is an intelligence is in potency with respect to the existence that it receives from God, and this received existence is received as its act

and

There are found in the intelligences both potency and act but not matter and form

Then it must be true that...

Existence received from God allows substances to subsist in the nature of things

If it is true that...

Existence received from God allows substances to subsist in the nature of things

and

Substances are composed of what is and that by which it is

Then it must be true that...

Potency and act exist in intelligences