Yet they are in reality
complicated, and when we attempt to deal with them in detail, our
assurance forsakes us. All of us have our "blind sides" intellectually--
quake to have certain areas of discussion entered, because we foresee that
we must sit idly by without power to make sensible comment. Unto as many
as possible of these blind sides of ourselves we should pronounce the
blessed words, "Let there be light." We have therefore to consider certain
matters and topics which are supposed to belong to the common currency of
social information, but with which our familiarity is less thoroughgoing
than it should be.
What are these facts and topics? Take for illustration the subject of
aeronautics. Suppose we have but the vaguest conception of the part played
or likely to be played by aircraft in war, commerce, and pleasure. Suppose
we are not aware that some craft are made to float and others to be driven
by propellers. Suppose such terms as Zeppelin, blimp, monoplane, biplane,
hydroplane, dirigible have no definite import for us. Does not our
knowledge fall short of that expected of well-informed men in this present
age?
Or take military terms. Everybody uses them--clergymen, pacifists,
clubmen, social reformers, novelists, tramps, brick-layers, Big-Stickers.
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