How does holding fast to Christ relate to our salvation?

In Hebrews 3:6, it indicates that we hold fast to our confidence and hope in Christ, but this is not a condition for salvation; rather, it is evidence of it. If we are genuinely in Christ, we will persevere in faith until the end, affirming that our salvation is secured not by our grip on Him but by His grip on us. This assurance is rooted in the understanding that if Christ has saved us, His presence and power in our lives will sustain us, enabling genuine faith to flourish despite challenges. Thus, our persistent faith is a response to the secure work of Christ in our hearts.