The benefits of the gospel are not limited to our justification. They also include our adoption. Paul reminds us that because we have been adopted, we are now heirs of the most high God.
The truth of the resurrection is a glorious truth, declaring Jesus to be the Son of God and declaring to us that all that is needed for our salvation has been accomplished.
It’s easy to forget that the while the law and the promise accomplish different things they are contrary to each other. Rather they work together. The law drives us to Christ to receive the promise he secured.
Here the Westminster Divines introduce the work of creation reminding us, among other things, that the work of creation was a work not of one person of the godhead but of all three persons.
One brig question in Galatians is, how do the law and promise relate? Paul begins to answer that question, first reminding us that the latter covenant, the law, does not annul the previous covenant, the promise.