Why is personal assurance of salvation important for Christians?

The assurance of salvation serves as a critical foundation for a believer's faith. In moments of doubt and spiritual warfare, as seen in David's life, the knowledge that God is our Savior provides comfort and strengthens our resolve to persevere in faith. This assurance encourages believers to rely on God's promises and His faithful character, fostering a deeper relationship with Him. Furthermore, it positions our hearts to rejoice in God's mercy and grace, affirming that despite the struggles we face, we are secure in His love and salvation, as highlighted in Psalm 35:3.