Remember that Jesus Christ - The apostle seems to say: Whatever tribulations or deaths may befall us, let us remember that Jesus Christ, who was slain by the Jews, rose again from the dead, and his resurrection is the proof and pledge of ours. We also shall rise again to a life of glory and blessedness.
According to my Gospel - The false teaching of Hymeneus and Philetus stated that the resurrection was past already. Paul preached the resurrection from the dead; and founded his doctrine on the resurrection and promise of Christ. This was his Gospel; the other was of a different nature.
Remember that Jesus Christ, of the seed of David, was raised from the dead - Or rather, perhaps, “Remember Jesus Christ; him who was raised from the dead.” The idea seems not to be, as our translators supposed, that he was to reflect on the fact that he was raised from the dead; but rather that he was to think of the Saviour himself. “Think of the Saviour, now raised up from the dead after all the sorrows of this life, and let this encourage you to bear your trials.” There is nothing better fitted to enable us to endure the labors and trials of this life, than to think of the Saviour. On the phrase “seed of David,” see the notes at Romans 1:3.
According to my gospel - The gospel which I preach; see the notes at 2 Thessalonians 2:14.