St. Alphonsus Liguori
“The devout Father Nieremberg says, that bread being a food which is consumed by eating, and which keeps when preserved for use, Jesus was pleased to dwell on earth under its species, that He might thus not only be consumed by uniting Himself to the souls of His lovers by the means of the Holy Communion, but also that He might be preserved in the tabernacle, and be present with us, and thus remind us of the love which He bears us. St. Paul says: ‘He emptied Himself, taking the form of a servant’ (Phil. ii. 7). But what must we say when we see Him ‘taking the form of bread?’ ‘No tongue would suffice,’ says St. Peter of Alcantara, ‘to proclaim the greatness of the love which Jesus bears to every soul which is in a state of grace; and therefore, in order that His absence might not be to them an occasion of forgetting Him, this most sweet Spouse, when He was pleased to quit this life, left as a memorial this Most Blessed Sacrament, in which He Himself remained; He willed not that between these souls and Himself any other pledge but Himself should remain, whereby to keep alive their remembrance of Him.'”
Source: St. Alphonsus Liguori, Visits to the Most Holy Sacrament