Cogito, ergo sum
1. I would think it should be "I am here because I think" not "I think because I am here". We could not be here without perceiving here.
2. "Thus I perceive the existence as something that belongs to the realm of my mind", should be more along the lines of "I perceive my mind
as existence".
3. Using cogito ergo sum, we can technically state we exist. I would suggest you read
Meditations. The fact that there is a thing that thinks points to the fact that there is indeed a thing. Though, I think cogito ergo sum falls short, as it is not so much that we think that makes us a subject, rather it is that we are
aware we think that makes us subjects. As through primary thinking, we become objects. With secondary cogito, we can view the objects as the subject.
With that, the secondary cogito is where reason lies, but this reason acts on the objects and is not itself an object. So, we do not live through reason, we reflect and perceive with it. I would argue that we do not feel reality solely through reason, rather we feel reality through negation And I do not think reason "denies the spirit" because it is not physical, nor because it is an abstract concept. The opposite of reason is not abstraction, they can easily go hand in hand.