Every serious scientific worker is painfully conscious of this involuntary relegation to an ever-narrowing sphere of knowledge, which threatens to deprive the investigator of his broad horizon and degrades him to the level of a mechanic.
However closely people are attached to one another, their mutual horizon nonetheless includes all four compass directions, and nowand again they notice it.
Our horizon is the creation of a noble society to which, like the medieval builder of those glorious cathedrals, you will have added your conception, your artful piece of stone.