Another question to (patristic) theologian friends

Is there a good patristic scholar out there who can answer me the following question :  do we already find the concept of ‘value’ (as in ‘moral values’) in the Church Fathers, or is it a later invention?

In fact I am wondering whether, historically speaking, it isn’t essentially a post-Christian idea....

I ask because it occurs frequently in a contemporary Russian Orthodox writer whom I am working on....