The pathos of the Children's Crusade of 1212 only nerved him to fresh efforts.
She undoubtedly nerved the French at a critical time, and inspired an army of laggards and pillagers with a fanatical enthusiasm, comparable with that of Cromwell's Puritans.
The ill success of Die Weltalter nerved him to new efforts, and he repeated his views in Katechismus des Rechts (1852), Grundlinen einer Wissenschaft der Natur (1864), Seele and Geist (1871), and numerous other books, which, however, met with no better fate.