Two separate causes, in fact, have conduced to the same result.

The one is the development of physical science; the other, the extension of trade.
The sole object of science being to discover truth, truth-telling is a necessity of its existence.

Professionally, scientists are obliged to be truthful.

Aliter of a Jesuit.
So long as science was of the closet, its influence upon mankind generally was indirect and slight; but so soon as it proceeded to stalk into the street and earn its own living, its veracious character began to tell.

When out of its theories sprang inventions and discoveries that revolutionized every-day affairs and changed the very face of things, society insensibly caught its spirit.