It was a novel and voluntary assumption of the condition of the bondservant, the Δοῦλος, of God.
And the bondservant abideth not in the house for ever: the son abideth for ever.
You decide now for yourself whether you are a bondservant or a free man.
Then Thurid the bondservant, who sat by the fire, looked up and said, "Ships are off the land."
Antecedently possessing the μορφὴ of God, He now de novo 'took' the μορφὴ of a bondservant.
He, the supreme bondservant, is to them (we continually read) absolute Lord.
Thou shalt not make him to serve as a bondservant: as an hired servant, and as a sojourner, he shall be with thee.