The Author, while listening last week to the Abolition Champions in the late "Pennsylvania Hall," was forcibly struck with the strong similarity between the _mode_ of argument adopted by them, and by the champions of Infidelity in the late public discussions, between them and him, in New York! They commenced their addresses with high-sounding words about _liberty!_ _oppression!_ _tyranny_, &c.! Having by this mode (_and they know the value of it!_) got ready access to the hearts of their audience, and made a favourable impression, so as to make the females whisper to each other, "Oh what a fine, good man, that must be," &c.(!) then they depicted, in the strongest colours, the horrors of slavery--next they issued forth a tirade of slander and abuse against all slaveholders; and lastly they proceeded to undermine the character of every man opposed to them--the credibility of every witness bearing testimony against them--and the motives of all men, _except themselves_! Moreover they invariably attacked the _abuses_ of each system (as if a system were answerable for its abuse) holding up to public odium, what every good man from his heart must condemn, viz: oppression, tyranny, and cruelty; thus leaving the vast majority of the audience under the impression that it was the _thing itself_, and not the _abuse of it_, on which they were animadverting! LIBERTY--there is scarcely a word in the English Vocabulary so often perverted as the term _liberty_.--A vast mass of mankind conceive that the meaning of the word is, a perfect privilege and license for each and every man to do as he pleases.--If this be the real and true meaning of liberty, and that where this is _not_, there is _slavery_, then there is no liberty in the United States, (and God forbid, say I, there ever should be here such liberty,) and every man, woman, and child in the Union, is a _slave_! I doubt not this is the kind of liberty at which some of the champions of Abolitionism, viz. Fanny Wright Darusmont--Owen--et hoc omne genus, are aiming! But is this the liberty sanctioned by God? No! Is this the liberty guaranteed by the declaration of Independence? No! Is this the liberty for which the Fathers of this Country fought and bled? No! No! Such liberty would be the most awful tyranny and oppression--The liberty authorised by God, and sanctioned by the laws of this Country, is, that no man shall do aught to the injury, prejudice, or hurt of his neighbour--This is the only true liberty granted by God to man; yet this is the very liberty, the advocates of Abolitionism turn into ridicule, and attempt to destroy, under the plausible plea of vindicating the rights of man! This was the plea of Thomas Paine--This was the plea of Robert Owen--this is the plea of Fanny Wright Darusmont--this is the plea of all the infidels on the face of the earth! But, say Abolitionists, the Bible commands us, to "do unto others as we would be done by." Admitted. This very passage was