Abstract
So far as philosophizing is concerned with another's thoughts, it is criticizing. No true philosopher, as such, merely accepts or merely reproduces, another's thoughts. The true philosopher starts anew — independently, solitarily. But his understanding of the work done by others can make his own philosophizing surer and quicker. He must see for himself. But sometimes he can more easily avoid the pitfalls that others have discovered and marked. Thus, in the social history of philosophizing there can be not only mere repetition and mere novelty, but also progress. Even the less able philosopher may improve on the results of a more able predecessor