"The nature of this joy; "unspeakable and full of glory." Unspeakable in the kind of it; very different from worldly joys, and carnal delights; of a vastly more pure, sublime, and heavenly nature, being something supernatural, and truly divine, and so ineffably excellent ... Unspeakable also in degree; it pleasing God to give them this holy joy, with a liberal hand, and in large measure, in their state of persecution."
— Jonathan Edwards
Source: A Treatise Concerning Religious Affections, Part I (on 1 Peter 1:8)