Mon centre cède, ma droite recule, situation excellente, j'attaque. - Ferdinand Foch

In a time such as ours when people believe they can do without an ideal, cast away what they call abstract ideas, live on realism, rationalism, positivism, reduce everything to knowledge or to the use of more or less ingenious and casual devices — let us acknowledge it here — in such a time there is only one means of avoiding error, crime, disaster, of determining the conduct to be followed on a given occasion — but a safe means it is, and a fruitful one; this is the exclusive devotion to two abstract notions in the field of ethics: duty and discipline; such a devotion, if it is to lead to happy results, further implies besides… knowledge and reasoning.

Les avions sont des jouets intéressants mais n'ont aucune utilité militaire

[T]he treaty [of Versailles]...provided for a fifteen-year occupation of the Rhineland, with retreats every five years. Such a guarantee, I said without mincing my words, was ‘from the military point of view, null; it will merely be an increase of work for the Allied occupation.’ I went on to say that whereas the treaty was non-existent as promoter of our security, it was distinctly bad for reparations. ... I asked who would be judge of the situation if we sought to reoccupy the Rhineland because of an infringement of terms by Germany. The Commission for Reparations would not suffice, I said. It cannot be denied that I was right on this point.