Treasury of Scripture Knowledge
For as the body is one, and hath many members, and all the members of that one body, being many, are one body: so also is Christ.
1 Corinthians 10:17
for the bread being one, as many as we are, we are one body: for we are all partakers of that one bread.
for as there are many members in one and the same body, but all the members have not the same office:
which is his body, a work compleatly finished in all its parts.
Being one body, acted by one spirit, since you all have but one expectation in view;
for the husband presides over his wife, as Christ presides over the church: and he it is that preserves the whole body.
he himself is the head of the church, which is his body. he is the prince, the first-born from the dead, that in all things he might be chief.
not adhering to the head, from which all the parts of the body derive its nutrition, and being firmly united together by its joints and ligaments, receives a divine increase.
may the peace of Christ, to which you are called to be but one body, influence your hearts, to be benevolent.
1 Corinthians 12:27
Thus you are the body of Christ, being the particular members of it.
now to Abraham and his offspring were the promises made. he does not say, "to offsprings," as if he spoke of many; but as speaking of one, "and to thy offspring," which means Christ.