Chapter six closes this letter with some final instructions and thoughts on living out the fruit of the Spirit. Because believers will still be overtaken in sin, it is important that the congregation restore them back to faith, in the gentleness of the Spirit, and help them carry their burdens as they grow (Galatians 6:1-2). At the same time, each person is responsible for lining himself up with the Spirit, not thinking he is better than the others, because we are each responsible for ourselves before God (Galatians 6:3-5).
This is important because, the way we decide to live (flesh or Spirit) will come to full fruition (Galatians 6:6-8). Like a harvest our actions we will reap what we sow and much more than we sow, so the apostle encouraged his readers to sow life through the Spirit. Because living for Christ in this world is a difficult task, he encouraged them to persevere, to not waver, and to do good for someone whenever the opportunity arises (Galatians 6:9-10).
His closing thoughts returned to those who were enslaving themselves under the Law by submitting to circumcision (Galatians 6:12-15), offering a final plea that they would stop their foolishness. Galatians 6:16 is often used by non-dispensationalists to try to prove that the Church (or all believers) make up the “true Israel” because of Paul’s phrase “the Israel of God.” Given the context of the rest of the letter, where Paul made a clear distinction between believing and unbelieving Jews (Israel) and all believers in Christ (Church), the grammar shows that Paul put his blessing on two groups: “all who will behave in accordance with this rule” (believing Gentiles) and “the Israel of God” (believing Jews). The structure of the sentence does not allow for these to be combined into one group in this verse.