While it is said, Today ... - That is, persevere as long as life lasts, or as long as it can be said "today;" and by persevering in this manner you will have evidence that you are the friends of the Redeemer. This is a quotation from Psalm 95:7. Paul means, undoubtedly, to make use of this language himself as a direct exhortation to the Christians to whom he was writing. He entreats them, therefore, as long as it could be said "today," or as long as life lasted, to take care lest they should harden their hearts as had been done in the temptation in the wilderness.

While it is said, To-day - You may see the necessity of perseverance from the saying, "Today, if ye will hear his voice," therefore harden not your hearts - do not neglect so great a salvation; hold fast what ye have obtained, and let no man take your crown. See on Hebrews 3:7-9 (note) and Hebrews 3:12 (note).

While it is said today,.... Exhort one another, and hold fast Christ and his Gospel, and faith and confidence therein; what follows is a repetition of the citation in Hebrews 3:7 in order to make a further improvement of it; which shows, that the words belong to the present times of the Gospel, and contain in them matter of moment, and great concern; and that Scripture instructions and exhortations are of perpetual use.

While it is said (ἐν τῷ λέγεσθαι)

The formula by which the writer reverts to the previous citation. Connect with if we hold fast. The exhortation of Hebrews 3:12 answered to Psalm 95:1-11; so the condition of fulfillment in Hebrews 3:14 is declared to rest on the same Scripture. Only on the ground of what is said in that Psalm does the holding fast come to pass. Rend. therefore, "We are fellows of Christ if we hold the beginning of our confidence steadfast unto the end, seeing it is said," etc.

{l} While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.

(l) So long as this voice sounds out.

3:15 While it is said. The thought and connection are, You are partakers of Christ, if you remain steadfast, and listen to the exhortation, 'To day if ye will hear', etc.

15. While it is said-connected with Heb 3:13, "exhort one another . while it is said, To-day": Heb 3:14, "for we are made partakers," &c., being a parenthesis. "It entirely depends on yourselves that the invitation of the ninety-fifth Psalm be not a mere invitation, but also an actual enjoyment." Alford translates, "Since (that is, 'for') it is said," &c., regarding Heb 3:15 as a proof that we must "hold . confidence . unto the end," in order to be "partakers of Christ."

3:14-19 The saints' privilege is, they are made partakers of Christ, that is, of the Spirit, the nature, graces, righteousness, and life of Christ; they are interested in all Christ is, in all he has done, or will do. The same spirit with which Christians set out in the ways of God, they should maintain unto the end. Perseverance in faith is the best evidence of the sincerity of our faith. Hearing the word often is a means of salvation, yet, if not hearkened to, it will expose more to the Divine wrath. The happiness of being partakers of Christ and his complete salvation, and the fear of God's wrath and eternal misery, should stir us up to persevere in the life of obedient faith. Let us beware of trusting to outward privileges or professions, and pray to be numbered with the true believers who enter heaven, when all others fail because of unbelief. As our obedience follows according to the power of our faith, so our sins and want of care are according to the prevailing of unbelief in us.