St. Thomas Aquinas
“A religious person, to whom God gave great love for the Most Blessed Sacrament, amongst other things, wrote as follows in a letter: ‘I see that every good thing that I have comes to me from the Most Blessed Sacrament. I have given and consecrated my whole self to Jesus in this Sacrament. I see innumerable graces, which are not granted because people do not go to this Divine Sacrament. I see the great desire that our Lord has to dispense His graces in the Sacrament. 0 holy mystery! O sacred Host! Where is it that God manifests His power the most, if it is not in this Host? For this Host contains all that God has ever done for us. Let us not envy the blessed who are in heaven, since on earth we have the same Lord, with greater wonders of His love. Endeavour that all with whom you speak should devote themselves to the Most Blessed Sacrament. I speak thus, because this Sacrament makes me beside myself. Neither can I cease speaking of the Most Blessed Sacrament, which deserves so greatly to be loved. I know not what to do for Jesus in this Sacrament.’”
Source: St. Thomas Aquinas, Summa Theologica