I give them eternal life, and they shall never perish; no one will snatch them out of my hand.

• John 10:28 NIV

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.'"

• Hebrews 3:7-11 NIV

So we see that they were not able to enter, because of their unbelief.

• Hebrews 3:19 NIV

Therefore, since the promise of entering his rest still stands, let us be careful that none of you be found to have fallen short of it. 2 For we also have had the good news proclaimed to us, just as they did; but the message they heard was of no value to them, because they did not share the faith of those who obeyed. 3 Now we who have believed enter that rest, just as God has said, "So I declared on oath in my anger, 'They shall never enter my rest.'" And yet his works have been finished since the creation of the world.

• Hebrews 4:1-3 NIV

If you declare with your mouth, "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved.

• Romans 10:9 NIV

He is able to deal gently with those who are ignorant and are going astray, since he himself is subject to weakness.

• Hebrews 5:2 NIV

It is impossible for those who have once been enlightened, who have tasted the heavenly gift, who have shared in the Holy Spirit, 5 who have tasted the goodness of the word of God and the powers of the coming age - 6 and then have fallen away - to be restored to repentance, because they themselves are crucifying the Son of God all over again and subjecting Him to open shame.

• Hebrews 6:4-6 NIV

Therefore, when Christ came into the world, he said: "Sacrifice and offering you did not desire, but a body you prepared for me;

• Hebrews 10:5 NIV

Therefore, brothers and sisters, since we have confidence to enter the Most Holy Place by the blood of Jesus, 20 by a new and living way opened for us through the curtain, that is, his body, 21 and since we have a great priest over the house of God, 22 let us draw near to God with a sincere heart and with the full assurance that faith brings, having our hearts sprinkled to cleanse us from a guilty conscience and having our bodies washed with pure water. 23 let us hold unswervingly to the hope we profess, for he who promised is faithful. 24 And let us consider how we may spur one another on toward love and good deeds, 25 not giving up meeting together, as some are in the habit of doing, but encouraging one another - and all the more as you see the Day approaching.

26 If we deliberately keep on sinning after we have received the knowledge of the truth, no sacrifice for sins is left, 27 but only a fearful expectation of judgment and of raging fire that will consume the enemies of God. 28 Anyone who rejected the law of Moses died without mercy on the testimony of two or three witnesses. 29 How much more severely do you think someone deserves to be punished who has trampled the Son of God underfoot, who has treated as an unholy thing the blood of the covenant that sanctified them, and who has insulted the Spirit of grace? 30 For we know him who said, "It is mine to avenge; I will repay," and again, "The Lord will judge his people." 31 It is a dreadful thing to fall into the hands of the living God.

32 Remember those earlier days after you had received the light, when you endured in a great conflict full of suffering. 33 Sometimes you were publicly exposed to insult and persecution; at other times you stood side by side with those who were so treated. 34 You were suffered along with those in prison and joyfully accepted the confiscation of your property, because you knew that you yourselves had better and lasting possessions. 35 So do not throw away your confidence; it will be richly rewarded.

36 You need to persevere so that when you have done the will of God, you will receive what he has promised. 37 For, "In just a little while, he who is coming will come and will not delay." 38 And, "But my righteous one will live by faith. And I take no pleasure in the one who shrinks back."

• Hebrews 10:19-38 NIV

Furthermore, just as they did not think it worthwhile to retain the knowledge of God, so God gave them over to a depraved mind, so that they do what ought not to be done.

• Romans 1:28 NIV

Do not be deceived: God cannot be mocked. A man reaps what he sows. 8 Whoever sows to please their flesh, from the flesh will reap destruction; whoever sows to please the Spirit, from the Spirit will reap eternal life.

• Galatians 6:7-8 NIV

Jesus replied, "No one who puts a hand to the plow and looks back is fit for service in the kingdom of God."

• Luke 9:62 NIV

You believe that there is one God. Good! Even the demons believe that - and shudder.

• James 2:19 NIV

... "My Spirit will not contend with humans forever, ..."

• Genesis 6:3 NIV