13. So, then, when the soul is in the prayer of quiet, let it repose in its rest--let learning be put on one side. The time will come when they may make use of it in the service of our Lord--when they that possess it will appreciate it so highly as to be glad that they had not neglected it even for all the treasures of the world, simply because it enables them to serve His Majesty; for it is a great help. But in the eyes of Infinite Wisdom, believe me, a little striving after humility, and a single act thereof, are worth more than all the science in the world. This is not the time for discussing, but for understanding plainly what we are, and presenting ourselves in simplicity before God, who will have the soul make itself as a fool--as, indeed, it is--in His presence, seeing that His Majesty so humbles Himself as to suffer it to be near Him, we being what we are. 14. Moreover, the understanding bestirs itself to make its thanksgiving in phrases well arranged; but the will, in peace, not daring to lift up its eyes with the publican, [11] makes perhaps a better act of thanksgiving than the understanding, with all the tropes of its rhetoric. In a word, mental prayer is not to be abandoned altogether now, nor even vocal prayer, if at any time we wish, or can, to make use of either of them; for if the state of quiet be profound, it becomes difficult to speak, and it can be done only with great pain. 15. I believe myself that we know whether this proceeds from the Spirit of God, or is brought about by endeavours of our own, in the commencement of devotion which God gives; and we seek of ourselves, as I said before, [12] to pass onwards to this quiet of the will. Then, no effect whatever is produced; it is quickly over, and aridity is the result. If it comes from Satan, the practised soul, in my opinion, will detect it, because it leaves trouble behind, and scant humility and poor dispositions for those effects which are wrought if it comes from God; it leaves neither light in the understanding nor steadiness in the truth. [13]