Reading to understand the meaning can be mind twisting and literally, requires some out of mind flexibility to get into the author's state of mind at the time and place of the thinking process.
The sporadic quotes above will give anybody the sense of confusion if they're not familiar with the author train of thought and the time and place for his insights.
Without being well aware of this kind of knowledge it will seem impossible to comprehend the meaning behind the writing.
The beauty of this kind of expressions; that it is possible, by getting into the same mindset as the author's and that by familiarize oneself with their habits.
That doesn't mean that understanding is an exact science, but it's kind of art by itself, you understand it the way you read it.
One can only be responsible for his own saying, not how it might be understood.