1 Peter 2:9-10
But you are a chosen generation, a royal priesthood, an holy nation, a peculiar people…
The word "peculiar," by which the thought is expressed in English, we derive directly through the Latin, and the use of the term in the secular life of the Romans will throw light on its meaning here in the spiritual sphere. The system of slavery prevailed in the Roman Empire. It interpenetrated all society. An elaborate code of laws had sprung up to regulate its complicated and unnatural relations. The slave, when he fell into slavery, lost all. He became the property of his master. But if he served faithfully, law and custom permitted him to acquire private property through his own skill or industry. A man might, for example, hire himself from his owner, paying him so much a day. He might then employ himself in art or even merchandise, and, if successful, might soon accumulate a considerable sum. Some slaves in this manner purchased their own liberty and raised themselves to a high position. Now the savings of a slave, after satisfying the demands of the master, were called his "peculium." The law protected him in his right to this property. It may be supposed to have been very dear to the poor man. It constituted his sole anchor of hope. He cherished it accordingly. From this a conception and expression have been borrowed to show the kind of ownership that God is pleased to claim in the persons who have been won back to Himself after they were lost.
Parallel VersesKJV: But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light:
WEB: But you are a chosen race, a royal priesthood, a holy nation, a people for God's own possession, that you may proclaim the excellence of him who called you out of darkness into his marvelous light: