A man is not necessarily intelligent because he has plenty of ideas, any more than he is a good general because he has plenty of soldiers.
 
[On n’est point un homme d’esprit pour avoir beaucoup d’idées, comme on n’est pas un bon général pour avoir beaucoup de soldats.]

Nicolas Chamfort (1741-1794) French writer, epigrammist (b. Nicolas-Sébastien Roch)

Products of Perfected Civilization [Produits de la Civilisation Perfectionée], Part 1 “Maxims and Thoughts [Maximes et Pensées],” ch. 7, ¶ 446 (1795) [tr. Mathers (1926)]
    (Source)

(Source (French)). Alternate translations:

A man is not clever simply because he has many ideas, just as he is not necessarily a good general because he has many soldiers.
[tr. Hutchinson (1902)]

One is not a man of wit simply because one has a great many ideas, any more than one is a good general simply because one has a great many soldiers.
[tr. Merwin (1969)]

Having a great many ideas doesn't betoken a fine mind, just as having a great many soldiers doesn't betoken a fine general.
[tr. Dusinberre (1992), ¶ 445]

Having a lot of ideas does not give a person esprit, in the same way that having a lot of soldiers doesn't make a person a good general.
[tr. Sinicalchi, ¶ 445]