“Of what violences, murders, depredations, have not the epic poets, from all antiquity, been the occasion, by propagating false honour, false glory, and false religion?”

"The California Question" (10 June 1850), as quoted in The Selected Works of Thaddeus Stevens http://books.google.com/books?id=A0Fs655TKfsC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false.
1850s
Context: There can be no fanatics in the cause of genuine liberty. Fanaticism is excessive zeal. There may be, and have been fanatics in false religion – in the bloody religions of the heathen. There are fanatics in superstition. But there can be no fanatic, however warm their zeal, in the true religion, even although you sell your goods and bestow your money on the poor, and go on and follow your Master. There may, and every hour shows around me, fanatics in the cause of false liberty – that infamous liberty which justifies human bondage, that liberty whose ‘corner-stone is slavery.’ But there can be no fanaticism however high the enthusiasm, in the cause of rational, universal liberty – the liberty of the Declaration of Independence.

The Devil You Know (originally published in Unknown Fantasy Fiction, August 1941), p. 67
Short fiction, No Boundaries (1955)

Virgidemarium (1598) IV.

Source: Macbeth

11
Writing for the Theatre (1962)

Blood Meridian (1985)

"On Works of Mercy and Compassion, Considered as The Proofs of True Religion", St. 6
Miscellaneous Poems (1773)
Context: Here, all ye learned, full of all Dispute,
Of true and false Religion lies the Root.
The Mind of Christ, when He became a Man,
With all Its Tempers, forms its real Plan,
The Sheep from Goats distinguishing full well; —
His Love is Heav'n, and Want of It is Hell.

74
The Zürau Aphorisms (1917 - 1918)