Third, consider the insistency of an idea. The insistency of a past idea with reference to the present is a quantity which is less, the further back that past idea is, and rises to infinity as the past idea is brought up into coincidence with the present. Charles Sanders Peirce
As art is a habit with reference to things to be done, so is science a habit in respect to things to be known. William Harvey
Gold is now money with reference to all other commodities only because it was previously, with reference to them, a simple commodity. Karl Marx
There is nothing to which an architect should devote more thought than to the exact proportions of his building with reference to a certain part selected as the standard. Vitruvius
Distinctly American poetry is usually written in the context of one's geographic landscape, sometimes out of one's cultural myths, and often with reference to gender and race or ethnic origins. Diane Wakoski
Once we recognize that all historical knowledge is relational knowledge, and can only be formulated with reference to the position of the observer, we are faced, once more, with the task of discriminating between what is true and what is false in such knowledge. Karl Mannheim