Since man is subject to temptation, there is always the danger of yielding to one or more of the fleshly sins. Paul addressed the relationships and duties that Christians have with each other.
When a brother (or sister) falls into sin, it is the responsibility of stronger Christians to restore such a person to spiritual health. Since all are subject to sin, restoration of a fallen brother MUST be done in humility and with a gentle spirit—not with an “I am better than you” attitude.
Stronger Christians are to help bear the burdens of the weaker brothers through love and encouragement. In the final judgment, however, each person is responsible for his own conduct. No one will stand at the judgment for another.
Paul turned his attention to the financial needs of teachers/preachers. They should receive not only financial support but also moral and spiritual support and encouragement from those who are being taught. This was especially needful during the times of trial and persecution of Paul.
Jesus taught His disciples the principles of sowing and reaping and Paul repeated them to the Galatians. One should sow liberally of his time, talents and money to the cause of Christ. It is obvious that one who sows seeds of a fleshly life will reap bitter fruit, whereas one who sows to the Spirit of God will reap everlasting life.
Paul included doing good as a Spiritual act, which would be rewarded at the end. He said, “Therefore, as we have opportunity, let us do good to all, especially to those who are of the household of faith.”
For whatever reason, Paul usually dictated his letters to a writer but would write the closing words with his own hand. He brought this to the attention of the Galatians. As a point of emphasis, he showed the sincerity of his admonitions by repeating his theme to refrain from following the Judaizing teachers and their doctrine.
Paul pointed out the hypocrisy of the Judaizers in that they did not keep the law that they were trying to force upon the Galatians. They only wanted to show their own power and to build up their own egos. His boasting was only in the cross of the Lord Jesus Christ. He had put off the old man of sin who had followed the old law and had then become a new creature in Christ.
In the end, Paul tempered his rebuke by calling the Galatians brethren. He invoked the grace of God upon them in his spirit of love, concern and anxiety for their souls.