A Letter Concerning Toleration is John Locke's argument that the civil government and the church are two distinct societies with different ends, and that the magistrate has no authority to compel belief or worship. Locke wrote it in Latin, as Epistola de Tolerantia, during the winter of 1685–86 while living in exile in the Dutch Republic, addressing it to his friend the Remonstrant theologian Philipp van Limborch.
Author
John Locke
· English philosopher and physician, author of the Two Treatises of Government

Frequently Cited
“it is ambition enough to be employed as an under-labourer in clearing the ground a little, and removing some of the rubbish that lies in the way to knowledge”
“Let us then suppose the mind to be, as we say, white paper, void of all characters, without any ideas:—How comes it to be furnished”
“yet every man has a property in his own person: this no body has any right to but himself”
“where there is no law, there is no freedom: for liberty is, to be free from restraint and violence from others; which cannot be, where there is no law”
“Where-ever law ends, tyranny begins, if the law be transgressed to another’s harm”
On this site
Locke says in the Epistle to the Reader that the Essay began when five or six friends meeting in his rooms found themselves at a standstill over questions of morality and revealed religion, and he proposed that they first examine what objects human understanding is fitted to deal with. Nearly twenty years later the result was a long, patient survey of where ideas come from, how they combine, how words signify them and how far knowledge and probable belief can reach.
The Second Treatise, subtitled 'An Essay Concerning the True Original, Extent, and End of Civil Government', is the constructive half of Locke's Two Treatises. The First Treatise demolishes Sir Robert Filmer's Patriarcha, which derived the absolute power of kings from Adam's fatherly dominion.