John 5:40

That coming is put for believing we know, Come unto Him, and be lightened. He adds, That ye might have life; (Ps. 33) For, if the soul which sinneth dies, they were dead in soul and mind. And therefore He promises the life of the soul, i. e. eternal happiness.

Wherefore Christ when He referred the Jews to the Scriptures, sent them not to a mere reading, but a careful and considerate search; for He said not, "Read the Scriptures," but, "Search the Scriptures." Since the sayings relating to Him required great attention, (for they had been concealed from the beginning for the advantage of the men of that time,) He biddeth them now dig down with care that they might be able to discover what lay in the depth below. These sayings were not on the surface, nor were they cast forth to open view, but lay like some treasure hidden very deep. Now he that searcheth for hidden things, except he seek them with care and toil, will never find the object of his search. For which cause He said, "Search the Scriptures, because in them ye think ye have eternal life." He said not, "Ye have," but "ye think," showing that they gained from them nothing great or high, expecting as they did to be saved by the mere reading, without the addition of faith. What He saith therefore is of this kind: "Do ye not admire the Scriptures, do ye not think that they are the causes of all life? By these I confirm My claims now, for they are they which testify of Me, yet ye will not come to Me that ye may have eternal life." It was thus with good reason that He said, "ye think," because they would not obey, but merely prided themselves on the bare reading.

Or thus; they cannot have abiding in them the Word which was in the beginning, who came not to keep in mind, or fulfil in practice, that word of God which they hear. Having mentioned the testimonies of John, and the Father, and of His works, He adds now that of the Mosaic Law: Search the Scriptures, for in them ye think ye have eternal life; and they are they which testify of Me: as if He said, Ye think ye have eternal life in the Scriptures, and reject Me as being opposed to Moses: but you will find that Moses himself testifies to My being God, if you search the Scripture carefully. All Scripture indeed bears witness of Christ, whether by its types, or by prophets, or by the ministering of Angels. But the Jews did not believe these intimations of Christ, and therefore could not obtain eternal life: Ye will not come to Me, that ye may have life; meaning, The Scriptures bear witness of Me, but ye will not come to Me notwithstanding, i. e. ye will not believe on Me, and seek for salvation at My hands.