Full Idea
Absolutely reasonable or unreasonable conduct could not exist in a world which was not itself the product of reason or governed by its dictates.
Gist of Idea
Conduct is only reasonable or unreasonable if the world is governed by reason
Source
Hastings Rashdall (Theory of Good and Evil [1907], II.III.I.4)
Book Reference
'The Existence of God', ed/tr. Hick,John [Macmillan 1964], p.148