How do we know that God's grace is required for every aspect of salvation?

The Bible makes it clear that all salvation is by God's grace, and this includes our ability to respond with gratitude. Isaiah 57 states, 'I create the fruit of the lips,' indicating that even our praises to God are products of His divine grace. This demonstrates that our old nature is enmity with God, and it is only through His grace that we can express thankfulness or worship Him. Thus, from the very inception of our salvation to our eternal praises, God's grace sustains and empowers us, making it essential in every aspect of our relationship with Him.