Albert Barnes Commentary on Philippians 3:10 - What is The Fellowship of Christ's Sufferings?

And the fellowship of his sufferings - That I may participate in the same kind of sufferings that he endured; that is, that I may in all things be identified with him. Paul wished to be just like his Saviour. He felt that it was an honor to live as he did; to evince the spirit that he did, and to suffer in the same manner. All that Christ did and suffered was glorious in his view, and he wished in all things to resemble him. He did not desire merely to share his honors and triumphs in heaven, but, regarding his whole work as glorious, he wished to be wholly conformed to that, and, as far as possible, to be just like Christ. Many are willing to reign with Christ, out they would not be willing to suffer with him; many would be willing to wear a crown of glory like him, but not the crown of thorns; many would be willing to put on the robes of splendor which will be worn in heaven, but not the scarlet robe of contempt and mockery.

They would desire to share the glories and triumphs of redemption, but not its poverty, contempt, and persecution. This was not the feeling of Paul. He wished in all things to be just like Christ, and hence he counted it an honor to be permitted to suffer as he did. So Peter says, “Rejoice, inasmuch as ye are partakers of Christ’s sufferings;” 1Pe_4:13. So Paul says Col_1:24 that he rejoiced in his sufferings in behalf of his brethren, and desired “to fill up that which was behind, of the afflictions of Christ,” or that in which he had hitherto come short of the afflictions which Christ endured. The idea is, that it is an honor to suffer as Christ suffered; and that the true Christian will esteem it a privilege to be made just like him, not only in glory, but in trial. To do this, is one evidence of piety; and we may ask ourselves, therefore, whether these are the feelings of our hearts. Are we seeking merely the honors of heaven, or should we esteem it a privilege to be reproached and reviled as Christ was - to have our names cast out as his was - to be made the object of sport and derision as he was - and to be held up to the contempt of a world as he was? If so, it is an evidence that we love him; if not so, and we are merely seeking the crown of glory, we should doubt whether we have ever known anything of the nature of true religion.