The Gifford Lectures at Glasgow, 1916-1918, Vol II.
Book III. The Order and Problems of Empirical Existence
Chapter IV. Mind and Knowing
A. The Cognitive Relation
...Using then the terms appropriate to mind in this metaphorical fashion we may say that any finite 'enjoys' itself and 'contemplates' lower finites
or has 'knowledge' of them. They are revealed to it so far forth as it has organs for apprehending them. Hence properties which belong to the lower finite may be unrevealed in their distinctive quality, but they are revealed in the character which belongs to their equivalents on a lower level still. Thus in my example of the floor and table the floor certainly does not 'know' the table as exerting pressure, it does not even know it as material (I return to this presently), but in some lower equivalent form as a persisting set of motions, as, say, accelerated towards it according to the gravitational law. At the same time each finite is related towards other finites of the same level as minds are related to one another. The material floor is assured of the materiality of the table.
...So far is the object from being dependent on the mind that, on the contrary, the mind is, at any rate for its original material, dependent on the object ; just as the silver must exist before it can be used as a shilling and be impressed with the king's effigy. Thus the higher grade of finites grows out of the lower and enjoying itself contemplates the lower in turn. Hence although mind cannot be and act without things from which to select its objects, neither the things nor the objects are affected in themselves by the presence of mind except so far as the mental conation alters them. What they are before the practical and alterative action takes place does not depend on the mind. So far as it is purely cognitive such alterative action is suspended. It follows that though for mind things are a condition, the presence of mind is not a condition of the existence or quality of things. All that they owe to mind is their being known.