I tremble to think that I have to give an account of my tongue. There is life, but there is also death in the tongue. Sometimes we kill with the tongue: we commit real murder. And we still regard that as a small thing? I truly do not understand such consciences. I have known a person who, when she learned from someone that a certain thing was being said about her, fell seriously ill. She lost a good deal of weight and shed many tears, and the outcome was very sad. It was not the sword that did all this, but the tongue. O my silent Jesus, have mercy on us all!” (St Faustina Kowalska’s Diary, 119)
Prayer of St. Faustina
“Help me, O Lord, that my tongue may be merciful, so that I should never [again] speak ill of my neighbour, but only have a word of comfort and forgiveness for all. I will not give my tongue the least bit of freedom; but in one case only I will give it complete freedom; that is, in proclaiming the glory of God.
Whenever I receive Holy Communion, I will ask Jesus to fortify and cleanse my tongue that I may not injure my neighbour with it. That is why I have the greatest respect for the rule, which speaks about silence. When I receive Holy Communion, I entreat and beg the Saviour to heal my tongue that I may never fail to love my neighbour.” (Diary 590)