You know what I'm talkin about!

7 Therefore, as the Holy Spirit says,

“Today, if you hear his voice,
8 do not harden your hearts as in the rebellion,
    on the day of testing in the wilderness,
9 where your fathers put me to the test
    and saw my works for forty years.
10 Therefore I was provoked with that generation,
and said, ‘They always go astray in their heart;
    they have not known my ways.’
11 As I swore in my wrath,
    ‘They shall not enter my rest.’”

12 Take care, brothers, lest there be in any of you an evil, unbelieving heart, leading you to fall away from the living God. 13 But exhort one another every day, as long as it is called “today,” that none of you may be hardened by the deceitfulness of sin. 14 For we have come to share in Christ, if indeed we hold our original confidence firm to the end. 15 As it is said,

“Today, if you hear his voice,do not harden your hearts as in the rebellion.”

The recipients of this letter knew exactly what the writer was talking about.  He was writing to Hebrews whose History is recorded in Numbers and the surrounding books.  They had hard hearts and rebelled against God, specifically breaking His commands, not believing it really mattered. But it did!  God made it clear to that generation. Don't be the generation that hears God's word, but chooses to ignore it. There are consequences. You know what I'm talking about...