“Zeal is that pure and heavenly flame,
The fire of love supplies;
While that which often bears the name,
Is self in a disguise. True zeal is merciful and mild,
Can pity and forbear;
The false is headstrong, fierce and wild,
And breathes revenge and war.”

"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.

187
The Reasonableness of Christianity (1695)

Introduction
Your Movie Sucks (2007)
Context: Some of these reviews were written in joyous zeal. Others with glee. Some in sorrow, some in anger, and a precious few with venom, of which I have a closely guarded supply. When I am asked, all too frequently, if I really sit all the way through these movies, my answer is inevitably: Yes, because I want to write the review.
I would guess that I have not mentioned my Pulitzer Prize in a review except once or twice since 1975, but at the moment I read Rob Schneider's extremely unwise open letter to Patrick Goldstein, I knew I was receiving a home-run pitch, right over the plate. Other reviews were written in various spirits, some of them almost benevolently, but of Deuce Bigalow: European Gigolo, all I can say is that it is a movie made to inspire the title of a book like this.

The Brethren (1904), PROLOGUE

ibid
The Rahotep series, Book 3: Egypt: The Book of Chaos (2011)
Context: Death makes us strangers to ourselves... Do not indulge yourself in a self-pitying, self-gratifying revenge. More than likely you would simply end up dead as well.

1840s, Heroes and Hero-Worship (1840), The Hero as Man of Letters

Knowing Yourself: The True in the False (1996)

Ó Rei subido,
Aventurar-me a ferro, a fogo, a neve
É tão pouco por vós, que mais me pena
Ser esta vida cousa tão pequena.
Stanza 79, lines 5–8 (tr. Thomas Moore Musgrave)
Epic poetry, Os Lusíadas (1572), Canto IV