How do we know God's grace is sufficient during troubles?

The sermon emphasizes that while believers will inevitably face hardships, God's grace plays a crucial role in their endurance. Scriptures such as Hebrews 10:38-39 affirm that the just shall live by faith, highlighting that our preservation is a testimony to God's grace in us. Believers are kept by God's power through faith, which enables them to persevere through difficulties. This assurance reinforces the notion that trials fulfill God's purposes and reveal His glory in our lives, ultimately showcasing the sustaining power of His grace amidst adversity.