It is true that habit soon blunts such impressions; in half in hour we begin to be more or less indifferent to all that is going on around us: but an ordinary character never attains to complete coolness and the natural elasticity of mind; and so we perceive that here again ordinary qualities will not suffice--a thing which gains truth, the wider the sphere of activity which is to be filled.

Enthusiastic, stoical, natural bravery, great ambition, or also long familiarity with danger--much of all this there must be if all the effects produced in this resistant medium are not to fall far short of that which in the student's chamber may appear only the ordinary standard.
Danger in War belongs to its friction; a correct idea of its influence is necessary for truth of perception, and therefore it is brought under notice here..