(zelos, parazeloo):

Occurs twice in the New Testament, once in a bad sense and once in a good sense.

(2) In Ro 11:14 the King James Version "emulation" is the translation of parazeloo ("to make one zealous or jealous"), and is there used in a good sense. "If by any means I may provoke to emulation (the Revised Version (British and American) jealousy) them that are my flesh" (compare Ro 10:19, quoted from De 32:21). It is well to "provoke to emulation" in this sense, those who are slow or indifferent, by the example of earnestness and zeal on our part. This is not to please "the flesh," but to serve "the Spirit."