V. 15.— While it is said, Today if ye will hear his voice, harden not your hearts, as in the provocation. The Apostle here recurs to the quotation already made from Psalms 95 :, which demonstrates that the word of the Lord endureth for ever, and that its warnings and exhortations are applicable to every age; for the Psalmist says to the men of his generation, “Today, if ye will hear his voice, harden not your hearts as in the provocation,”— referring to a transaction which took place hundreds of years before.