Or the meaning is, that the most perfect sonship will only be attained at the resurrection, as saith the Apostle, Waiting for the adoption, to wit, the redemption of our body. (Rom. 8:23) He therefore gave us the power to become the sons of God, i. e. the power of obtaining this grace at some future time.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).