Full Idea
When P is an essence of O it follows that P is a necessary property of O. However, P can be a necessary property of O without being an essence of O.
Gist of Idea
Essential properties are necessary, but necessary properties may not be essential
Source
Anand Vaidya (Understanding and Essence [2010], 'Knowledge')
Book Reference
-: 'Philosophia' [-], p.819
A Reaction
This summarises the Kit Fine view with which I sympathise. However, I dislike presenting essence as a mere list of properties, which is only done for the convenience of logicians. But was Jessie Owens a great athlete after he lost his speed?