The Romans have been criticized for adding nothing to Stoic philosophy and his criticism is largely valid. Even in the case of Ethics where they spent most of their energy, the Romans concentrated more on the interpretation of Zeno and Chrysippus than they did on any new ideas.
Stoicism in the first century A.D. was not a refined or reinterpreted version of the original, but a continuation of its founder’s ideals. The impact on Christianity, then, was mainly due to its penetration of Hellenistic culture over three centuries prior to its time. For those who embraced Stoicism at the time of Jesus, Christian philosophy appeared as a kindred belief system once it had gained the form of dogma.