hence, the word is transferred by Paul in a theocratic sense to the office (duty) intrusted to him by God (the lord and master) of proclaiming to men the blessings of the gospel
Replacement Theology is not the answer. In rightly dividing the word, we see the role for Israel and a role for the body of Christ. The prophecies of Israel will be fulfilled and the body of Christ will be taken into heaven as promised.
Now the serpent was more subtil than any beast of the field which the LORD God had made. And he said unto the woman, Yea, hath God said, Ye shall not eat of every tree of the garden?