Assurance forever! Is it not a wonderfully-pleasing expression? Assurance not for a few days, or weeks, or months - nor yet for a few years, or even a lifetime - but forever! It is this blessed assurance that God delights to impart to all who come to Him as needy sinners seeking the way of life.
Two words are employed in this verse that are intimately related - peace and assurance. Yet how many deeply-religious people there are in the world who scarcely know the meaning of either term. They are honestly seeking after God. They are punctilious about their religious duties, such as reading the Scriptures, saying their prayers, attending church, partaking of the sacrament, and supporting the cause of Christ. They are scrupulously honest and upright in all their dealings with their fellowmen, endeavoring to fulfil every civic and national responsibility, and to obey the golden rule. Yet they have no lasting peace, nor any definite assurance of salvation. I am persuaded that in practically every such instance the reason for their unquiet and unsettled state is due to a lack of apprehension of God's way of salvation.
Though living seven centuries before Calvary, it was given to Isaiah to set forth in a very blessed manner the righteousness of God as later revealed in the gospel. This is not to be wondered at for he spoke as he was moved by the Holy Spirit.
The key word of his great book, often called the fifth gospel, is the same as in the Epistle to the Romans - the word, "righteousness." And I would urge the reader to meditate on this word for a little and see how it is used in the Holy Scriptures.