Events are only comparable because they body forth permanences.
We are comparing objects in events whenever we can say, 'There it is again.' Objects are the elements in nature which can 'be again.' Sometimes permanences can be proved to exist which evade recognition in the sense in which I am using that term.

The permanences which evade recognition appear to us as abstract properties either of events or of objects.

All the same they are there for recognition although undiscriminated in our sense-awareness.

The demarcation of events, the splitting of nature up into parts is effected by the objects which we recognise as their ingredients.

The discrimination of nature is the recognition of objects amid passing events.