Quotations by:
    Drummond, William

He, who will not reason, is a bigot; he, who cannot, is a fool; and he, who dares not, is a slave.

William Drummond of Logie-Almond (1770-1828) Scottish classical scholar, philosopher, diplomat, politician

Academical Questions, Preface (1805)
    (Source)

Sometimes misattributed to Byron.