2 Corinthians 4:13-15 (ESV)
Since we have the same spirit of faith according to what has been written, “I believed, and so I spoke,” we also believe, and so we also speak, knowing that he who raised the Lord Jesus will raise us also with Jesus and bring us with you into his presence. For it is all for your sake, so that as grace extends to more and more people it may increase thanksgiving, to the glory of God.
In the above passage Paul takes a portion of a psalm (Psalms 116:10) and applies it to his own (and the Corinthians) situation. The psalmist has had some tribulations. He has been delivered, miraculously, by God from these tribulations and is praising God for this deliverance. It was the palmist belief in God that gave him hope. In this section Paul applies that same truth to his own situation. He is so convinced in the truth of the resurrection that he has great hope. This great hope increases to extreme thanksgiving and the glory of God.
No matter our own situation, we can rejoice with great thanksgiving and bring glory to God by our faith in the resurrection. This is our greatest hope. Because Jesus was raised from the dead we have great hope and we are blessed for evermore. It is the hope of the resurrection that motivates Paul to persevere under extreme circumstances. Note what he wrote just before this passage:
2 Corinthians 4:8-12 (ESV)
We are afflicted in every way, but not crushed; perplexed, but not driven to despair; persecuted, but not forsaken; struck down, but not destroyed; always carrying in the body the death of Jesus, so that the life of Jesus may also be manifested in our bodies. For we who live are always being given over to death for Jesus’ sake, so that the life of Jesus also may be manifested in our mortal flesh. So death is at work in us, but life in you.
It is only the hope of the resurrection that motivates us to endure through those types of life circumstances.