Quotes about logic
Philosophy aims at the logical clarification of thoughts. Philosophy is not a body of doctrine but an activity.
All concepts, even those which are closest to experience, are from the point of view of logic freely chosen conventions.
The supreme task of the physicist is the discovery of the most general elementary laws from which the world-picture can be deduced logically. But there is no logical way to the discovery of these elemental laws. There is only the way of intuition, which is helped by a feeling for the order lying behind the appearance, and this Einfühlung [literally, empathy or 'feeling one's way in'] is developed by experience.
Reason is a harmonising, controlling force rather than a creative one. Even in the most purely logical realms, it is insight that first arrives at what is new.
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