If it is true that...

Accidents have incomplete definitions because they cannot be defined without a subject

and

Substantial form and matter do not have complete essences individually, but together they form a complete essence

Then it must be true that...

Essence is found in substances and in accidents

If it is true that...

The differences of color are caused by the abundance or paucity of light

and

Different species of color are caused by the abundance or paucity of light

Then it must be true that...

Essence is found in substances and in accidents

If it is true that...

Essence is found in substances and in accidents

and

Essence is found in composite substances and in simple ones

and

The universal intentions of logic are found in substances, accidents, composite substances, and simple ones

Then it must be true that...

Being and essence are the things first conceived of by the intellect