He is onstage now to die, unrepentant to the last, and breathing the belief of all extremists always — that all misfortune comes from compromise and that only unyieldingness can win out.

Isaac Asimov (1920-1992) Russian-American author, polymath, biochemist

Asimov’s Guide to Shakespeare, “Henry VI, Part III” (1970)
    (Source)

Regarding Clifford, the Lancastrian fanatic, in Act 2, sc. 6.