St John Eudes was born in 1601 and became a priest, missionary and preacher. He fought against Jansenism, the heresy of his day. In addition to founding two religious orders, he is also known for promoting great devotion to the Hearts of Jesus and Mary.
Here is some good advice on how we should assist worthily at the Holy Sacrifice of the Mass from this saint whose feast we celebrate today.
You should adore our Lord Jesus Christ, who makes himself present to us on the altar, so that we might offer him the homage and adoration we owe. Pray that just as he changes the lower earthly nature of bread and wine into his body and blood he might change and transform also the sluggishness, coldness and dryness of our earthly and arid heat into the fire, tenderness and agility of the holy divine affections and dispositions of his divine and heavenly heart. Then you should remember that Christians are one with Jesus Christ, as members with their head... They should also be there as hosts and victims who are but one host just as they are one priest with Jesus Christ. They need to be immolated and sacrificed with the same Jesus Christ for the glory of God.