" I will here give you an infallible guide. You can perform this experiment to verify the truth. It is this: retire from the world and all conversation, only for one month; neither write, nor read, nor debate anything with yourself. Stop all the former workings of your heart and mind, and with all the strength of your heart, stand all this month, as continually as you can, in the following form of prayer to God. Offer it frequently on your knees; but whether sitting, walking, or standing, be always inwardly longing and earnestly praying this one prayer to God: That of His great goodness He would make known to you, and take from your heart, every kind and form and degree of pride, whether it be from evil spirits, or your own corrupt nature; and that He would awaken in you the deepest depth and truth of that humility, which can make you capable of His light and Holy Spirit. Reject every thought, but that of waiting and praying in this matter from the bottom of your heart, with such truth and earnestness, as people in torment wish to pray and be delivered from it. If you can, and will give yourself up in truth and sincerity to this spirit of prayer, I will venture to declare that, if you had twice as many evil spirits in you as Mary Magdalene had, they will all be cast out of you, and you will be forced with her to weep tears of love at the feet of the holy Jesus. Ibid., p. 124. "
― Andrew Murray , Humility: The Journey Toward Holiness