“Of all the conditions of his youth which afterwards puzzled the grown-up man, this disappearance of religion puzzled him most. The boy went to church twice every Sunday; he was taught to read his Bible, and he learned religious poetry by heart; he believed in a mild deism; he prayed; he went through all the forms; but neither to him nor to his brothers or sisters was religion real. Even the mild discipline of the Unitarian Church was so irksome that they all threw it off at the first possible moment, and never afterwards entered a church. The religious instinct had vanished, and could not be revived, although one made in later life many efforts to recover it.

That the most powerful emotion of man, next to the sexual, should disappear, might be a personal defect of his own; but that the most intelligent society, led by the most intelligent clergy, in the most moral conditions he ever knew, should have solved all the problems of the universe so thoroughly as to have quite ceased making itself anxious about past or future, and should have persuaded itself that all the problems which had convulsed human thought from earliest recorded time, were not worth discussing, seemed to him the most curious social phenomenon he had to account for in a long life.”

The Education of Henry Adams (1907)