The great spiritual writer Père de Caussade knew the Poor Clares in Albi.  His conferences might have contained his suggestions on the proper preparation for Holy Mass:
“For Holy Communion these two points will suffice: before Communion let us act like Martha, and after like Mary,—that is to say we should prepare ourselves by fervent acts of virtue and of the good works adapted to our state, without uneasiness and without over-eagerness, and then reflect on Jesus Christ, on His infinite merits and love and remain united to Him in an ineffable peace.”                             - Self-Abandonment to Divine Providence, “Counsel
                                                                                     II, On Outward Behavior”