Why is it important for Christians to depend solely on grace?

Dependence solely on grace is essential because it upholds the Gospel's integrity and God's glory. If righteousness or any part of salvation were derived from human efforts, it would frustrate God's grace and diminish the glory due to Him. As emphasized in Galatians 3:3, to begin in the Spirit and seek perfection through the flesh contradicts the very essence of grace. Understanding that salvation rests completely on God's grace leads to true humility and thanksgiving in believers, fostering a life that praises Him alone for their redemption.