They are the best physicians, who being great in learning most incline to the traditions of experience, or being distinguished in practice do not reflect the methods and generalities of art.
The logic now in use serves rather to fix and give stability to the errors which have their foundation in commonly received notions than to help the search for truth. So it does more harm than good.
It would be unsound fancy and self-contradictory to expect that things which have never yet been done can be done except by means which have never yet been tried.
One always starts work with the subject, no matter how tenuous it is, and one constructs an artificial structure by which one can trap the reality of the subject-matter that one has started from.