It appears that is what the brain does...it forms consciousness.
True, there would be no consciousness apart from a brain.
When you say "forms consciousness" what do you mean?
In one sense the brain conditions
rational thought because things such as alcohol can be seen to impair rational thinking. But to say it
conditions is not the same as to say it
causes. Its normal to be able to choose a stimulus for thought, to choose one over another, even as those stimuli perhaps come before me. A book on a table doesn't
force me to concentrate on it.
What I believe is that things 'out there' possess being and truth from some
source.
From the age of eleven or twelve (maybe earlier) I have had this leaning toward Thomist thought. Sometimes its dulled, and then something re-awakens it. I could hardly have articulated it in philosophical terms. In fact it seems intuition is slightly more receptive when not engaged in thought about thought.
Water is still water even before I know anything about its chemistry, my thought doesn't make it water. It still has the fluid dynamics of water even if I don't know what they are or how to express them.
A human brain may be a receiver, so to speak, of
eternal reason.
But people have other things going on in them also, passions, emotions, mental conflicts and sometimes injury, and other times stress. These may
affect how one reasons. Additionally one has to learn or be taught how to reason, which is what Logic is about.