If it is true that...

In the intelligences, there is existence beyond the form

and

An intelligence is form and existence

Then it must be true that...

Everything that pertains to a thing either is caused by the principles of its own nature or comes from some extrinsic principle

If it is true that...

In every other thing, the thing's existence is one thing, and its essence or quiddity or nature or form is another

and

In the intelligences, there is existence beyond the form

Then it must be true that...

An intelligence is form and existence