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.
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.