Moral Letters to Lucilius Section 15

Infans sine dentibus est: huic constitutioni suae conciliatur. Enati sunt dentes; huic constitutioni conciliatur. Nam et illa herba, quae in segetem frugemque ventura est, aliam constitutionem habet tenera et vix eminens sulco, aliam, cum convaluit et molli quidem culmo, sed quo ferat onus suum, constitit, aliam cum flavescit et ad aream spectat et spica eius induruit; in quamcumque constitutionem venit, eam tuetur, in eam componitur.

autre est celle de la première enfance, autre celle du second âge, autre celle du vieillard ; et tous savent y concorder. La première enfance n’a point de dents et s’en passe volontiers ; les dents lui viennent, elle apprend à s’en servir. Le brin d’herbe qui deviendra paille et froment et qui, tendre encore, lève à peine hors du sillon, n’est pas constitué comme au jour où, déjà plus ferme, il se tient sur sa tige assez forte dans sa faiblesse pour supporter le jeune épi ; il change une troisième fois quand il jaunit, et que son épi durci n’attend plus que le fléau ; mais quelle que soit sa façon d’être, il y concourt, il s’y accommode.

But each age has its own constitution, different in the case of the child, the boy, and the old man; they are all adapted to the constitution wherein they find themselves. The child is toothless, and he is fitted to this condition. Then his teeth grow, and he is fitted to that condition also. Vegetation also, which will develop into grain and fruits, has a special constitution when young and scarcely peeping over the tops of the furrows, another when it is strengthened and stands upon a stalk which is soft but strong enough to bear its weight, and still another when the colour changes to yellow, prophesies threshing-time, and hardens in the ear - no matter what may be the constitution into which the plant comes, it keeps it, and conforms thereto.