Subject-object, knowledge, or, more widely, self-consciousness with its implicates - this unity in duality is the ultimate aspect which reality presents.
When we combine his view of Nature under the first head that whatever is inferred in the natural sciences is ideas, with his view of knowledge under the second head that knowledge is experience, and experience, individual or universal, is of duality of subject and object in the unity of experience, it follows that all we could know from the data would be one experience of the race, one subject consisting of individual subjects, and in Nature single objects in the unity of this universal experience; and beyond we should be able to form conceptions dependent on the perceptions of individual experience in the unity of universal experience: that is all.
Or again, within the latter in his admission of a duality of thought and " the given " in knowledge, which within knowledge was apparently irreducible, concurrently with hints as to the possibility, upon a wider view, of the sublation of their disparateness at least hypothetically and speculatively.
The retention of the old duality of dignities was the one reminiscence of the original separation.
In the Trinity the problem is to combine independence and unity; in Christology, to combine duality of nature 2 with the unity of the person.