Mental prayer is that which is made without employing either words or formulas of any kind. Catholics are exhorted to beware of underrating the usefulness or necessity of vocal prayer. Common vocal prayers include the Lord's Prayer (Our Father, Pater Noster), the Hail Mary (Ave Maria, Angelic Salutation), the Glory Be (Gloria Patri, Minor Doxology), and the Apostles' Creed (Symbolum Apostolorum).