W. Balck, Tactics, Volume 1 (of 2). Introduction and Formal Tactics of Infantry
“ The importance of drill, which cannot be replaced by anything else, does not become apparent until all enthusiasm disappears, until the leader becomes conscious of the specter of panic which stalks by the side of enthusiasm.“Discipline,” says Archduke John in his well-known work Drill or Training, “must not be confounded with the snappy drill of troops, and can, moreover, not be attained by means of it. The straightjacket has never yet cured one insane person; the soul cannot be disciplined through the body. One must work from the inside and not from the outside. ”
