Warning against unbelief

⁷ So, as the Holy Spirit says:

‘Today, if you hear his voice,
⁸     do not harden your hearts
as you did in the rebellion,
    during the time of testing in the wilderness,
⁹ where your ancestors tested and tried me,
    though for forty years they saw what I did.
¹⁰ That is why I was angry with that generation;
    I said, “Their hearts are always going astray,
    and they have not known my ways.”
¹¹ So I declared on oath in my anger,
    “They shall never enter my rest.”’

¹² See to it, brothers and sisters, that none of you has a sinful, unbelieving heart that turns away from the living God. ¹³ But encourage one another daily, as long as it is called ‘Today’, so that none of you may be hardened by sin’s deceitfulness. ¹⁴ We have come to share in Christ, if indeed we hold our original conviction firmly to the very end. ¹⁵ As has just been said:

‘Today, if you hear his voice,
    do not harden your hearts
    as you did in the rebellion.’

¹⁶ Who were they who heard and rebelled? Were they not all those Moses led out of Egypt? ¹⁷ And with whom was he angry for forty years? Was it not with those who sinned, whose bodies perished in the wilderness? ¹⁸ And to whom did God swear that they would never enter his rest if not to those who disobeyed? ¹⁹ So we see that they were not able to enter, because of their unbelief.