For to which of the angels did the Father ever say,

“You are My Son,
Today I have begotten (fathered) You [established You as a Son, with kingly dignity]”?

And again [did He ever say to the angels],

“I shall be a Father to Him
And He shall be a Son to Me”?

Therefore, just as the Holy Spirit says,

“Today if you hear His voice,

But continually encourage one another every day, as long as it is called “Today” [and there is an opportunity], so that none of you will be hardened [into settled rebellion] by the deceitfulness of sin [its cleverness, delusive glamour, and sophistication].

while it is said,

“Today [while there is still opportunity] if you hear His voice,
Do not harden your heart, as when they provoked Me [in the rebellion in the desert at Meribah].”

Therefore, while the promise of entering His rest still remains and is freely offered today, let us fear, in case any one of you may seem to come short of reaching it or think he has come too late.

He again sets a definite day, [a new] “Today,” [providing another opportunity to enter that rest by] saying through David after so long a time, just as has been said before [in the words already quoted],

“Today if you hear His voice,
Do not harden your hearts.”

So too Christ did not glorify Himself so as to be made a high priest, but He [was exalted and appointed by the One] who said to Him,

“You are My Son,
Today I have begotten (fathered) You [declared Your authority and rule over the nations]”;

Jesus Christ is [eternally changeless, always] the same yesterday and today and forever.