Now we must observe, that conjectures concerning the stars are necessary to the life of man, as long as we do lot push our searches into their signs beyond due limits. For it is possible to discover some things with respect to coming rain, still more concerning heat and the force of the winds, whether partial or universal, stormy or gentle. But the great advantage that is rendered to life by these conjectures is known to every one. For it is of importance to the sailor to prognosticate the dangers of storms, to the traveller the changes of the weather, to the husbandman the abundant supply of his fruits.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: in Hexam. Hom. 6, 4.