Isaiah 56:1-8 is driven by the commandments and conditional elements in Isaiah 1-4, 6 such as keeping God’s Sabbath. These obligations of righteousness become our ticket for entering and remaining in God’s feast or banquet (cf. Isaiah 55:1). The end of Isaiah 56:1 explains why the conditions must be met. Isaiah 56:5, 7 explain what the righteous will enjoy. An angle on the gospel is found in the fact that Jesus experienced what the foreigner and eunuchs feared in Isaiah 56:3. It’s very interesting to me that in a system where we are saved by faith, we are judged according to our works. Isaiah now helps me understand James a bit better, especially being justified by works which proves the authenticity of our faith. In their new book, Puritan Theology, Beeke and Jones include an insightful chapter on the subject of judgement according to works by Thomas Manton.