The great business of man is to improve his mind, and govern his manners; all other projects and pursuits, whether in our power to compass or not, are only amusements.
The ancients had little doubt about the true shape of the earth: "It's [the world's] shape has the rounded appearance of a perfect sphere. This is shown first of all by the name of 'orb' which is bestowed upon it by the general consent of mankind. ...Our eyesight also confirms this belief, because the firmament presents the aspect of a concave hemisphere equidistant in every direction, which would be impossible in the case of any other figure."
No man's abilities are so remarkably shining as not to stand in need of a proper opportunity, a patron, and even the praises of a friend to recommend them to the notice of the world.