If we conceive all the changes in the physical world as reducible to the motion of atoms, motions generated by means of the fixed nuclear forces of those atoms, the whole of the world could thus be known by means of the natural sciences.
To say that my anxiety is reducible to the ions in my amygdala is as limiting as saying that my personality or my soul is reducible to the molecules that make up my brain cells or to the genes that underwrote them. Scott Stossel
I became an atheist because, as a graduate student studying quantum physics, life seemed to be reducible to second-order differential equations. Mathematics, chemistry and physics had it all. And I didn't see any need to go beyond that. Francis Collins
I studied what the Germans call the Naturwissenschaften, the natural sciences. Everything from biology to geology. How the clouds are formed, how the animals live, and what makes the rocks. So I know about nature. Period. Vaclav Smil
I started off thinking that maybe the social sciences ought to have the kinds of mathematics that the natural sciences had. That works a little bit in economics because they talk about costs, prices and quantities of goods. Herbert A. Simon
There's this old saying that, if you aren't particularly gifted in natural sciences, if you don't want to become a teacher or pastor or doctor, and don't know what else to do, then you become a lawyer. But I've never regretted it. Bernhard Schlink