“Beware the fury of a patient man”

Source: Cross

This has recently become attributed to Calhoun on the internet and in print, but seems to be a derivative of John Dryden's statement in Absalom and Achitophel (1681): Beware the Fury of a Patient Man.
Disputed

Source: Things Fall Apart (1958), Chapter 11 (p. 95)

As quoted by Leonard Sweet, The Greatest Story Never Told http://books.google.gr/books?id=KuTRcjWL91AC&dq=, section: "The Gift of Lyrics", Abingdon Press, 2012
Variant: "Beware the man of one book."
See also: Homo unius libri
Disputed
Variant: I fear the man of a single book.

#83
1900s, Maxims for Revolutionists (1903)

As quoted in Good Advice (1993), edited by William Safire and ‎Leonard Safir, p. 215

Latin fragment from Vergil's Aeneid, Book XII, line 499 : ‘He threw away all restraint on his anger.’
Introductio ad prudentiam: Part II (1727)

Source: Incarceron

Introductio ad prudentiam: Part II (1727), Gnomologia (1732)