There is a sense in which the whole spiritual life and spiritual history hang upon spiritual hearing. Between the two extremes of death and life, between listening to Satan and having an ear only for the Lord, there are many aspects of spiritual hearing, as we have seen in the above passages. We will not touch upon them now in detail, but be content for the moment to emphasize the necessity of having an ear to hear what the Spirit saith, and of using it - "He that hath an ear, let him hear".
We must be sure that we are not only hearing outwardly, but that the thing is going deep inside, that it is making a difference. You can say things again and again to some people, and they know what you say, and will retort, 'I have heard you say that before'. But it makes no difference - they have not heard with the inward ear. Life depends upon that kind of hearing inside - using the ear that we have for what the Spirit saith. So it is all summed up in "I beseech you therefore, brethren, by the mercies of God, to present your bodies a living sacrifice, holy, acceptable to God, which is your spiritual service (worship, R.V.M)" (Rom. 12:1).