In 1880 Teresa wrote this letter to Fr. Powell, in which Our Lord revealed to her the terrible judgements of war that would happen in the future. This was published in Lady Cecil Kerr's biography of 1927, when the atomic bomb had not even been imagined:
“If it were not in obedience, I should never attempt to describe the dreadful things which have been shown to me, but, trusting in that wisdom and power, I hope He will give you a right understanding and knowledge of all that you wish me in His Name to relate. Oh Jesus, my beloved Jesus, be Thou a Jesus to us and save us whom Thou hast redeemed by Thy most precious Blood. I know not how or where I was taken, but it seemed to me that I was in a high place and looked down upon the earth. First I saw a cloud of darkness encompass the earth, a real thick material darkness which I understood too was a figure of the darkness of the intellect into which man had precipitated himself, then I heard the sound of mighty thunder and saw the lightning flash, and it seemed to me as if balls of fire fell upon the earth and struck it to its centre splintering the rocks to fragments. And I heard the rush of waters and a fearful wail of mourning arose from the earth, and humbly prostrating myself I craved for mercy through the Blood and bitter Passion of Jesus Christ, for through this darkness could be seen distinctly shining stars on the bosom of the earth (the holy tabernacles of His love), and I begged God not to look upon us but on the face of His Christ. And I heard a mighty voice say, ‘I will not save this people for they are flesh. Ask me not in His Blood for His Blood is upon them.’ (I understood to condemn them). But still I continued uniting my poor prayer with that of our dear crucified Jesus, saying over and over again, ‘Father forgive them for they know not what they do. Jesus, Mercy! Mary, help!’
“I cannot say how long this lasted, for I was as much afraid as I was humbled, but then I heard a voice I knew full well to be that of our dear Lord and Saviour Jesus Christ saying: ‘Say that not one of these that are given to me shall be lost.’ Then the earthquakes stopped and the lightnings ceased and I beheld starved and maniac looking forms rise trembling to their feet, and I saw the sign upon their foreheads, and with them and the whole court of heaven I praised and blessed that God of infinite wisdom who in His mercy has redeemed us in His Blood.