"As then in the sad and anxious times through which we are passing there are many who cling so firmly to Christ the Lord hidden beneath the Eucharistic veils that neither tribulation, nor distress, nor famine, nor nakedness, nor danger, nor persecution, nor the sword can separate them from His love, surely no doubt can [...]
"For every one, the absolute and necessary price of heaven, is fidelity to his own grace, to his particular grace. God does not demand from all an equal measure of merits and virtues; but there is, nevertheless, one measure strictly required, one condition essential for all, and that is the state of grace. One must [...]
"Humility, humility, and ever humility, as we can do nothing ourselves; all is purely and simply God’s grace." Source: St. Faustina, Diary: Divine Mercy in My Soul
"The effect of this sacrament (Eucharist) is received according to man's condition: such is the case with every active cause in that its effect is received in matter according to the condition of the matter. But such is the condition of man on earth that his free-will can be bent to good or evil. Hence, [...]
"What a source of grace there is in spiritual communion! Practice it frequently and you'll have greater presence of God and closer union with Him in all your actions." Source: St. Josemaria Escriva, The Way: The Essential Classic of Opus Dei's Founder, Image, 2006
"The tendency to celebrate the Eucharist only when there was an assembly of the faithful emerged in those years. According to the Council, although everything possible should be done to gather the faithful for the celebration, it is also true that, even if the priest is alone, the Eucharistic offering which he performs in the [...]
"The grace of the virtues is infused, but their practice is acquired by subsequent labor and attention. They must be cultivated." Source: St. Peter Julian Eymard, The Divine Eucharist St. Peter Julian Eymard was a priest and the founder of the Congregation of the Blessed Sacrament. This religious order is "a Catholic religious congregation [...]
"The Sacrament of the Eucharist is itself a striking and wonderful figure of the unity of the Church, if we consider how in the bread to be consecrated many grains go to form one whole, and that in it the very Author of supernatural grace is given to us, so that through Him we may [...]
At every celebration of the Eucharist, we are spiritually brought back to the paschal Triduum: to the events of the evening of Holy Thursday, to the Last Supper and to what followed it. Source: St. John Chrysostom, Homily 47
"The power of this sacrament can be considered in two ways. First of all, in itself: and thus this sacrament has from Christ's Passion the power of forgiving all sins, since the Passion is the fount and cause of the forgiveness of sins. Secondly, it can be considered in comparison with the recipient of the [...]