Galatians 6:2 - Matthew Poole's English Annotations on the Holy Bible

Bear ye one another's burdens; it is a general precept, and may be either understood with reference to what he had said in the former verse, so it hints our duty: though we discern our brethren to have fallen into some sin or error, yet if we discern that they are sensible of their lapse, and their sin is not a pleasure, but a burden to them, though we ought not to bear with them or connive at them in their sins, yet we ought to sympathize with them when we see their sin is become their load and burden, under which they groan and are dejected. Or else more generally, as a new precept commanding us to sympathize with our brethren under any lead of trials and affliction which God shall lay upon them. And so it agreeth with that precept, Romans 12:15. By the law of Christ, he means the will of Christ revealed in the gospel; particularly the law of love, so nmch enjoined by Christ, 1 Thessalonians 13:15,1 Thessalonians 13:33-35 15:12. Which is not called the law of Christ because first given by him, (for himself maketh it the sum of the ten commandments), but because he received it and vindicated it from the corruption of the Pharisees interpretation, Matthew 5:43,44; because he so often urged it, and so seriously commanded and commended it to his disciples; and set us the highest precedent and example of it, and hath by his Spirit written it in the hearts of his people.