Why is it urgent for Christians to remain in Christ?

As the apostle John emphasizes in this sermon, remaining in Christ is urgent due to the proximity of Christ's return, which creates the necessity of continual faithfulness. The world is passing away, and our assurance as believers is that Christ is coming soon, as indicated in 1 John 2:28. If we are not abiding in Him, we may face the risk of shame rather than confidence when He appears. This urgency serves as a reminder for all believers to actively cultivate their relationship with Christ daily and to hold fast to the hope of His glorious return.