A general idea, though it be nothing but a particular one considered in a certain view, is commonly more obscure; and that because no particular idea, by which we represent a general one, is ever fixed or determinate, but may easily be changed for other particular ones, which will serve equally in the representation.
There is a noted passage in the history of Greece, which may serve for our present purpose.

Themistocles told the Athenians, that he had formed a design, which would be highly useful to the public, but which it was impossible for him to communicate to them without ruining the execution, since its success depended entirely on the secrecy with which it should be conducted.

The Athenians, instead of granting him full power to act as he thought fitting, ordered him to communicate his design to Aristides, in whose prudence they had an entire confidence, and whose opinion they were resolved blindly to submit to.

The design of Themistocles was secretly to set fire to the fleet of all the Grecian commonwealths, which was assembled in a neighbouring port, and which being once destroyed would give the Athenians the empire of the sea without any rival Aristides returned to the assembly, and told them, that nothing coued be more advantageous than the design of Themistocles but at the same time that nothing coued be more unjust: Upon which the people unanimously rejected the project.
A late celebrated historian [Mons.

Rollin {Charles Rollin, HISTOIRE ANCIENNE.( Paris 1730-38)}.] admires this passage of antient history, as one of the most singular that is any where to be met.
"Here," says he, "they are not philosophers, to whom it is easy in their schools to establish the finest maxims and most sublime rules of morality, who decide that interest ought never to prevail above justice.
It is a whole people interested in the proposal which is made to them, who consider it as of importance to the public good, and who notwithstanding reject it unanimously, and without hesitation, merely because it is contrary to justice." For my part I see nothing so extraordinary in this proceeding of the Athenians.