As we develop ideological thought, we work over and over various interrelated concepts as they are inherited and as they are modified or formed through our interactions with reality.
The boundary between abstract thought and material reality is only an artificial, conceptual one, as the two mutually interact and affect each other. Thought affects reality insofar as it informs the numerous practical actions that are meant to account for the effects of reality, or otherwise attempt to manipulate reality.
Reality affects thought by tempering its many inquiring and oscillating forms, as they come to contradict various material and social realities.
But then a successful ideology entrenches its forms, patterns, and interactions with the real through repetition, and continues to repeat itself even as it continues to change the reality it interacts with, until the contradictions are great enough to cause it to break out of its inertial pattern and unravel.
We really only make this distinction because thoughts are produced by concentrations of energy which are seeking to sustain themselves, and as such produce boundaries.
However, these boundaries do tend to melt away with more ease the less emphasis is placed on distinction by thought.