All men are liable to error; and most men are, in many points, by passion or interest, under temptation to it. - John Locke

If anyone maintain that men ought to be compelled by fire and sword to profess certain doctrines, and conform to this or that exterior worship, without any regard had unto their morals; if anyone endeavour to convert those that are erroneous unto the faith, by forcing them to profess things that they do not believe and allowing them to practise things that the Gospel does not permit, it cannot be doubted indeed but such a one is desirous to have a numerous assembly joined in the same profession with himself; but that he principally intends by those means to compose a truly Christian Church is altogether incredible.

"Slavery is so vile and miserable an Estate of Man, and so directly opposite to the generous Temper and Courage of our Nation; that 'tis hardly to be conceived, that an Englishman, much less a Gentleman, should plead for't.. And truly, I should have taken Sr. Rt: Filmer's "Patriarcha" as any other Treatise, which would perswade all Men, that they are Slaves, and ought to be so, for such another exercise of Wit, as was his who writ the Encomium (Praise) of Nero, rather than for a serious Discourse meant in earnest, had not the Gravity of the Title and Epistle, the Picture in the Front of the Book, and the Applause that followed it, required me to believe, that the Author and Publisher were both in earnest. I therefore took it into my hands with all the expectation and read it through with all the attention due to a Treaties, that made such a noise at its coming abroad and cannot but confess my self mightily surprised, that in a Book which was to provide Chains for all Mankind, I should find nothing but a Rope of Sand, useful perhaps to such, whose Skill and Business it is to raise a Dust, and would blind the People, the better to mislead them, but in truth is not of any force to draw those into Bondage, who have their Eyes open, and so much Sense about them as to consider, that Chains are but an Ill wearing, how much Care soever hath been taken to file and polish them."

Chapter VII
Of Simple Ideas of both Sensation and Reflection
1. Ideas of pleasure and pain.
There be other simple ideas which convey themselves into the mind by all the ways of sensation and reflection, viz. pleasure or delight,
and its opposite, pain, or uneasiness; power; existence; unity.