Recommended edition: A Letter Concerning Toleration, ed. James Tully (Indianapolis: Hackett, 1983).

Excerpt:

I think indeed there is no nation under heaven, in which so much has already been said upon that subject, as ours. But yet certainly there is no people that stand in more need of having something further both said and done amongst them, in this point, than we do.Our government has not only been partial in matters of religion; but those also who have suffered under that partiality, and have therefore endeavoured by their writings to vindicate their own rights and liberties, have for the most part done it upon narrow principles, suited only to the interests of their own sects…. Absolute Liberty, Just And True Liberty, Equal And Impartial Liberty, Is The Thing That We Stand In Need Of. Now though this has indeed been much talked of, I doubt it has not been much understood; I am sure not at all practised, either by our governors towards the people in general, or by any dissenting parties of the people towards one another. … I cannot therefore but hope that this discourse, which treats of that subject, however briefly, yet more exactly than any we have yet seen, demonstrating both the equitableness and practicableness of the thing, will be esteemed highly seasonable, by all men who have souls large enough to prefer the true interest of the public, before that of a party.

Online:
Online Library of Liberty (Free Version)
Amazon (Recommended Edition)