What hymn talks about assurance?

The hymn "Blessed Assurance" by Fanny J. Crosby is a well-known song that emphasizes the theme of assurance in faith. It expresses a deep sense of confidence and peace that comes from a personal relationship with Jesus Christ. The refrain celebrates the joy and security found in salvation, making it a beloved choice in Christian worship. This hymn reassures believers of their eternal hope and connection to God.