Car ce n'est pas assez d'avoir l'esprit bon, mais le principal est de l'appliquer bien.

It is not good enough to have a good mind; the main thing is to use it well.

-- Rene Descartes (1596 - 1650) French philosopher, mathematician, scientist, writer, Discourse on the Method of Rightly Conducting the Reason, and Seeking Truth in the Sciences, Pt 1 (1637)