2 Corinthians 4: the basis of truth within Christianity

5 For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake.
6 For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.
7 ¶But we have this treasure in earthen vessels, that the excellency of the power may be of God, and not of us.
8 We are troubled on every side, yet not distressed; we are perplexed, but not in despair;
9 Persecuted, but not forsaken; cast down, but not destroyed;
10 Always bearing about in the body the dying of the Lord Jesus, that the life also of Jesus might be made manifest in our body.
11 For we which live are alway delivered unto death for Jesus' sake, that the life also of Jesus might be made manifest in our mortal flesh.