Full Idea
In the four-dimensional ontology there may be timeless variation, but there is no change. Change consists in an object having first one property and then another contrary one. But processes all have their properties timelessly.
Gist of Idea
Four-dimensional ontology has no change, since that needs an object, and time to pass
Source
Peter Simons (Parts [1987], 3.4)
Book Reference
Simons,Peter: 'Parts: a Study in Ontology' [OUP 1987], p.126
A Reaction
Possibly Simons is begging the question here. The phenomena which are traditionally labelled as 'change' are all nicely covered in the four-D account. Change is, we might say, subsumed in the shape of the space-time 'worm'.