To compel a man to furnish contributions of money for the propagation of opinions which he disbelieves and abhors, is sinful and tyrannical;. . . even the forcing him to support this or that teacher of his own religious persuasion, is depriving him of the comfortable liberty of giving his contributions to the particular pastor whose morals he would make his pattern. . . .
Goethe's devil is a cultivated personage and acquainted with the modern sciences; sneers at witchcraft and the black art even while employing them, and doubts most things, nay, half disbelieves even his own existence.
A Unitarian very earnestly disbelieves what everyone else believes.
If a writer disbelieves what he is writing, then he can hardly expect his reader to believe it.