At the end of the second play that Therese had written on Joan of Arc, the costume she wore almost caught fire. The alcohol stoves used to represent the stake at Rouen set fire to the screen behind which Therese stood. Therese did not flinch but the incident marked her. The theme of fire would assume an increasing importance in her writings. On 9 June 1895, during a Mass celebrating the feast of the Holy Trinity, Therese had a sudden inspiration that she must offer herself as a sacrificial victim to "merciful love". At this time some nuns offered themselves as a victim to God's "justice". In her cell she drew up an 'Act of Oblation' for herself and for Céline, and on 11 June, the two of them knelt before the miraculous Virgin and Therese read the document she had written and signed. "In the evening of this life, I shall appear before You with empty hands, for I do not ask You Lord to count my works." According to biographer, Ida Görres, the document echoed the happiness she had felt when Father Alexis Prou, the Franciscan preacher, had assured her that her faults did not cause God sorrow. In the Oblation she wrote, ""If through weakness I should chance to fall, may a glance from Your Eyes straightway cleanse my soul, and consume all my imperfections – as fire transforms all things into itself"".