Shepherd of Hermas

"Put away sorrow from thyself," saith he, "for she is the sister of doubtful-mindedness and of angry temper."

"How, Sir," say I, "is she the sister of these? For angry temper seems to me to be one thing, doubtful-mindedness another, sorrow another." "Thou art a foolish fellow," saith he, "[and] perceivest not that sorrow is more evil than all the spirits, and is most fatal to the servants of God, and beyond all the spirits destroys a man, and crushes out the Holy Spirit and yet again saves it."