How do believers know they are saved?

The assurance of salvation for believers comes from several sources, primarily from the Holy Spirit. Romans 8:16 states that 'the Spirit itself beareth witness with our spirit, that we are the children of God.' Additionally, 1 John 5:13 assures us that 'these things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life.' This knowledge is rooted in faith – trust in Christ's completed work on the cross, where He fully satisfied God's justice for our sins. Believers may also experience an internal witness of faith and the transformation of their lives, reflecting their new identity in Christ.