How do they succeed in veiling it from them?
It is by _metaphor_.

They alter, they force, they deprave the meaning of three or four words, and all is done.
Such a word is _invasion_ itself.

An owner of an American furnace says, "Preserve us from the _invasion_ of English iron." An English landlord exclaims, "Let us repel the _invasion_ of American wheat!" And so they propose to erect barriers between the two nations.
Barriers constitute isolation, isolation leads to hatred, hatred to war, and war to _invasion_.

"Suppose it does," say the two sophists; "is it not better to expose ourselves to the chance of an eventual _invasion_, than to accept a certain one ?" And the people still believe, and the barriers still remain.
Yet what analogy is there between an exchange and an _invasion_?
What resemblance can possibly be established between a vessel of war, which comes to pour fire, shot, and devastation into our cities, and a merchant ship, which comes to offer to barter with us freely, voluntarily, commodity for commodity?
As much may be said of the word _inundation_.

This word is generally taken in bad part, because _inundations_ often ravage fields and crops.