The Talent of Mechanics

Generally speaking, people have a very erroneous idea of the type of talent proper to the ideal mechanician. He is not a geometrician who, delving into the theory of movement and the categories of phenomena, formulates new mechanical principles or discovers unsuspected laws of nature.… In most other branches of science are to be found constant principles; a multitude of methods offer to the genius inexhaustible possibilities. If a scholar poses himself a new problem, he can attack it fortif...

 Reduce Phenomena to the Proximate Causes and Primitive Fo...

I think that considerable progress can be made in the analysis of the operations of nature by the scholar who reduces rather complicated phenomena to their proximate causes and primitive forces, even though the causes of those causes have not yet been detected.

 Freedom is the Only Requirement for Enlightenment

Nothing is required for this enlightenment, however, except freedom; and the freedom in question is the least harmful of all, namely, the freedom to use reason publicly in all matters. But on all sides I hear: "Do not argue!" The officer says, "Do not argue, drill!" The tax man says, "Do not argue, pay!" The pastor says, "Do not argue, believe!" (Only one ruler in the World says, "Argue as much as you want and about what you want, but obey!") In this we have examples of pervasive restrictions...