The intellectual takes as a starting point his self and relates the world to his own sensibilities the scientist accepts an existing field of knowledge and seeks to map out the unexplored terrain.
For example I spent a lot of time with Reagan both before he ran for governor and when he was running for president. As a print reporter without the cameras I was able to really test the quality of their minds and their knowledge base.
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The presentations and conceptions of the average man of the world are formed and dominated not by the full and pure desire for knowledge as an end in itself but by the struggle to adapt himself favourably to the conditions of life.