Blaise Pascal: It is necessary to show that there is nothing so little known , nothing more difficult to practice, or nothing more usef

It is necessary to show that there is nothing so little known , nothing more dif — Blaise Pascal

It is necessary to show that there is nothing so little known , nothing more difficult to practice, or nothing more useful and universal.

Source: Wikiquote (CC BY-SA 3.0). Quotations may be subject to their authors' rights and may be shown in translation.