The physiological study of mental conditions is thus the most powerful ally of hortatory ethics.

因此，精神状况生研究是劝诫最有力友。

Some of these books were, on the face of it, frivolous and facetious;but many, on the other hand, were serious and prophetic, moral and hortatory.

从表面上看，其中一些书是轻浮和滑稽；但另一方面，许多书是严肃、预言性、道德和规劝性。