What does the Bible say about perfect love casting out fear?

In 1 John 4:18, John states that 'There is no fear in love, but perfect love casts out fear.' This perfect love is rooted in our understanding of God's love for us, which was demonstrated through the sacrificial death of Jesus Christ. When believers grasp the depth of God's love and the fullness of Christ's atoning work, they are freed from the fear of judgment that naturally weighs upon those who know they have sinned against a holy God. This understanding allows them to approach God with confidence, assured of His grace and mercy.