Why is it important for Christians to understand their faith?

In Matthew 17:14-20, Jesus teaches that even faith as small as a mustard seed can accomplish great things, emphasizing that it is not the quantity but the presence of faith that matters. Recognizing personal inadequacy and the grace of God leads to a deeper appreciation for salvation. Understanding one's faith involves grappling with the nature of God, their own sin, and the sufficiency of Christ's atonement, as seen in Romans 7:18, where the struggle against sin manifests a believer's dependence on God and His mercy for salvation and security.