We can only be conscious of brain content that can in principle be remembered. Especially, we cannot become conscious of the many processes going on that occur for example to process the sensory input leading to our final realization of reality. Only the result of these processes can be remembered and can become conscious, not the processes themselves.
We are not able to remember things in a way that we can freely recall them, if they have not previously been conscious.
Consciousness is just that brain content, for example ideas and thoughts, that are transferred in the direction to our permanent memory, where we can later freely access this content.
The active impression of consciousness only results, because the active unconscious leaves no traces that can be remembered and because of the intense interactions between active unconscious processes and conscious remembered content.
- Feelings are feedback from our body or the unconscious to our remembered conscious. This feedback has to become conscious, because otherwise no lasting effect or intentional action could be induced by the feelings. This also solves the 'hard problem of consciousness' posed by David Chalmers.