And thine ears shall hear a word - A command or admonition. You shall not be left without spiritual guides and directors.

Behind thee - That is, says Vitringa, the voice of conscience, as an "invisible" guide, shall admonish you. The idea, however, seems to be that if they were ignorant of the way, or if they were inclined to err, they should be admonished of the true path which they ought to pursue. The idea is taken either from the practice of teachers who are represented as "following" their pupils and admonishing them if they were in danger of going astray (Grotius; or from shepherds, who are represented as following their flocks, and directing them when they wandered. The Jews understand this voice 'from behind' to be the כל בת bath kol - 'the daughter of the voice;' a divine admonition which they suppose attends the pious. The essential thought is, that they would not be left without a guide and instructor; that, if they were inclined to go astray, they would be recalled to the path of truth and duty. Perhaps there is the idea, also, that the admonition would come from some "invisible" influence, or from some unexpected quarter, as it is often the case that those who are inquiring on the subject of religion receive light from quarters where they least expected, and from sources to which they were not looking. It is also true that the admonitions of Providence, of conscience, and of the Holy Spirit, seem often to come from "behind" us. that is, they "recall" us from the path in which we were going, and restrain us from a course that would be fraught with danger.

When ye turn to the right hand ... - When you shall be in danger of wandering from the direct and straight path. The voice shall recall you, and direct you in the way in which you ought to go.

When ye turn to the right hand, and when ye turn to the left "Turn not aside, to the right or to the left" - The Syriac Chaldee, and Vulgate, translate as if, instead of כי־וכי ki-vechi, they read לא־ולא lo-velo.

And thine ears shall hear a word behind thee,.... Which may be said in reference to the backsliding and declining state of the people, Isaiah 30:11 and is thought by some to be an allusion to schoolmasters, who stand behind their scholars, or at their backs, to guide, teach, and instruct them; and by others to shepherds following their flocks, who, when they observe any of the sheep going out of the way, call them back; or to travellers, who, coming to a place where are several ways, and being at a loss which way to take, and inclining to turn to the right or left, are called to by persons behind them, and directed in the right way. This "voice behind" is by the Jews (e) interpreted of Bath Kol; and by others of the voice of conscience; but it rather intends the Spirit of God, and his grace; though it seems best to understand it of the Scriptures of truth, the word of God, the only rule of faith and practice; the language of which is,

saying, This is the way, walk ye in it; it directs to Christ the way, and who is the only way of life and salvation to be walked in by faith, and to all the lesser paths of duty and doctrine, which to walk in is both pleasant and profitable, and which is the right way; so the Targum paraphrases it,

"this is the right way;''

to which agree the comments of Aben Ezra, Jarchi, and Kimchi; though the Arabic and Syriac versions, following the Septuagint, represent them as the words of seducers, directing to a wrong way: but the words are a promise of being led right, and not a threatening of being led wrong:

when ye turn to the right hand, and when ye turn to the left; through ignorance or inadvertency, through the prevalence of corruption, or force of temptation; and as it is promised there should be such a voice, so they should have ears to hear, their ears erect to attend to what is said, to observe it, and act according to it.

(e) T. Bab. Megilla, fol. 32. 1.

And thy ears shall hear a word behind thee, saying, This is the way, {s} walk ye in it, when ye turn to the right hand, and when ye turn to the left.

(s) God will direct all your ways and appoint you how to go either hither or thither.

30:21 Shall hear - Thou shalt hear the voice of God's word and spirit. Behind thee - A metaphor borrowed from shepherds, who use to follow their sheep, and recall them when they go out of the way.

21. word-conscience, guided by the Holy Spirit (Joh 16:13).

30:19-26 God's people will soon arrive at the Zion above, and then they will weep no more for ever. Even now they would have more comfort, as well as holiness, if they were more constant in prayer. A famine of bread is not so great a judgment as a famine of the word of God. There are right-hand and left-hand errors; the tempter is busy courting us into by-paths. It is happy if, by the counsels of a faithful minister or friend, or the checks of conscience, and the strivings of God the Spirit, we are set right when doubting, and prevented from going wrong. They shall be cured of their idolatry. To all true penitents sin becomes very hateful. This is shown daily in the conversion of souls, by the power of Divine grace, to the fear and love of God. Abundant means of grace, with the influences of the Holy Spirit, would be extended to places destitute of them. The effect of this should be comfort and joy to the people of God. Light, that is, knowledge, shall increase. This is the light which the gospel brought into the world, and which proclaims healing to the broken-hearted.