One of the first and most difficult steps in a science is to conceive clearly the nature of the magnitudes about which we are arguing.


Chapter III, Theory of Utility, p. 78. - The Theory of Political Economy (1871)


One of the first and most difficult steps in a science is to conceive clearly the nature of the magnitudes about which we are arguing.

One of the first and most difficult steps in a science is to conceive clearly the nature of the magnitudes about which we are arguing.

One of the first and most difficult steps in a science is to conceive clearly the nature of the magnitudes about which we are arguing.

One of the first and most difficult steps in a science is to conceive clearly the nature of the magnitudes about which we are arguing.