I love that prayer—it’s one of the prayers that I pray before Communion which is in the torn-up prayer book I carry in my purse. There’s another one by St. Ambrose. Reading/praying these on my way to Communion helps me to stay “focused”, too.
Book Four -- An Invitation to the Holy Communion
Imitation of Christ: 4, 1, (97) The Great Reverence With Which We Should Receive Christ [Devotional]
Imitation of Christ:4,2(98) God's Great Goodness and Love...Shown to Man in...Sacrament[Devotional]
Imitation of Christ: 4, 3 (99) It Is Profitable To Receive Communion Often [Devotional}
Imitation of Christ: 4, 4(100) Many Blessings Are Given...Receive Communion Worthily [Devotional]
Imitation of Christ: 4, 5 (101) The Dignity of the Sacrament and of the Priesthood [Devotional]
Imitation of Christ: 4, 6 (102) An Inquiry on the Proper Thing to do Before Communion [Devotional]