Prayer to Saint Joseph for Purity

Saint Joseph, father and guardian of virgins, into whose faithful keeping were entrusted Innocency itself, Christ Jesus, and Mary, the Virgin of virgins, I pray and beseech thee, through Jesus and Mary, those pledges so dear to thee, to keep me from all uncleanness, and to grant that my mind may be untainted, my heart pure and my body chaste; help me always to serve Jesus and Mary in perfect chastity. Amen.