The gospel offers blessings; what must we do to receive them?
The proper answer is 'nothing'!
We do not have to *do* anything.
We have only to *believe*.
Our response is not 'the works of the law' but 'hearing with faith', that is,
not obeying the law, but believing the gospel.
For obeying is to attempt to do the work of salvation ourselves,
whereas believing is to let Christ be our Saviour and to rest in his finished work.
--From "The Message of Galatians" (The Bible Speaks Today series: London and Downers Grove: IVP, 1968), p. 75. Thanks John Stott!