In calling both Christian men and women sons, the Bible is saying that we enjoy the same privileged legal status and benefits as sons did in the time of Paul’s writing. This doesn’t exclude women in any way. Rather, in New Testament days the family life and inheritance were passed on through the sons, not the daughters, and by calling men and women “sons,” the Bible bestows on both the highest honor and most privileged familial position in that culture. Men and women are equally adopted with equal legal standing and an equal inheritance from God the Father.

From Mark Driscoll’s Who Do you Think You Are?: Finding Your True Identity in Christ (Nashville, TN: Thomas Nelson, 2013), p. 235 n.6.

My wife and I just “happened” to find this book at a local Savers yesterday as we shopped for clothes 50% off. I love it when God gives us surprises like this!