Reminders of the gospel that was preached to you, which you received, in which you stand, and by which you are being saved, that you may hold fast to the word preached to you.
What's the Gospel? Put it in a sentence. The Gospel is the news that Jesus Christ, the righteous One, died for our sins. Rose again, eternally triumphant over all his enemies so that there is now no condemnation for those who believe, but only everlasting joy. That's the gospel. Never. You never. Now listen to this. You never never never never never never never never never never never never never never outgrow your need for the gospel. Don't ever think of the gospel as that's the way you get saved and then you get strong by leaving it and doing something else. No. We are strengthened by God through the gospel every day till the day we drop.