So also Christ did not exalt himself to become high priest, but was appointed by the one who said to him, “You are my Son, today (sēmeron | σήμερον | adverb) I have become your Father”;
God again ordains a certain day — “today” (sēmeron | σήμερον | adverb) — saying through David, after so long a time, just as it has been said before, “Today (sēmeron | σήμερον | adverb), if you hear his voice, do not harden your hearts.”
But encourage one another every day, as long as it is called “today,” (sēmeron | σήμερον | adverb) that none of you may be hardened by the deceitfulness of sin.
For to which of the angels did God ever say, “My Son are you! Today (sēmeron | σήμερον | adverb) I have fathered you”? Or again, “I will be to him a father, and he shall be to me a son”?
But their minds were closed. For until the present (sēmeron | σήμερον | adverb) day the same veil remains at the reading of the old covenant. Since the veil is not removed, it is clear that only in Christ is it taken away.
as it is written, “God gave them a spirit of stupor, eyes that would not see and ears that would not hear, to this very (sēmeron | σήμερον | adverb) day.”
As day was about to dawn, Paul urged them all to take some food, saying, “Today (sēmeron | σήμερον | adverb) is the fourteenth day that you have continued in suspense and been without food, having taken nothing.