An excerpt from "Got Questions.org" entitled, "What Does it Mean to be Struck Down but not Destroyed (2 Corinthians 4:9)?" states: "Like Paul, there are things in life that threaten to strike us down. Because of our faith, we can be persecuted, alienated, or ridiculed. In moments of extreme hardship, it is critical to refocus our attention on God and remember that He alone is our source of strength. It is only by God’s power, and not our own, that we can be “struck down, but not destroyed” (2 Corinthians 4:9). The world may wound us, but it cannot destroy us because our future is certain with Jesus Christ (2 Corinthians 4:13–14)." This article may be viewed at: What Does it Mean to be Struck Down but not Destroyed/gotquestions.org
Reference: 1 Corinthians 6:7