Losing Salvation

Ex 32:33
And the LORD said to Moses, "Whoever has sinned against Me, I will blot him out of My book.
NKJV

Rom 11:22
Consider therefore the kindness and sternness of God: sternness to those who fell, but kindness to you, provided that you continue in his kindness. Otherwise, you also will be cut off.
(NIV)

John 15:1-2
"I am the true vine, and my Father is the gardener. 2 He cuts off every branch in me that bears no fruit, while every branch that does bear fruit he prunes so that it will be even more fruitful.
(NIV)

1 Cor 9:24-27
4 Do you not know that those who run in a race all run, but one receives the prize? Run in such a way that you may obtain it. 25 And everyone who competes for the prize is temperate in all things. Now they do it to obtain a perishable crown, but we for an imperishable crown. 26 Therefore I run thus: not with uncertainty. Thus I fight: not as one who beats the air. 27 But I discipline my body and bring it into subjection, lest, when I have preached to others, I myself should become disqualified.
NKJV

1 Cor 10:1-12
For I do not want you to be ignorant of the fact, brothers, that our forefathers were all under the cloud and that they all passed through the sea. 2 They were all baptized into Moses in the cloud and in the sea. 3 They all ate the same spiritual food 4 and drank the same spiritual drink; for they drank from the spiritual rock that accompanied them, and that rock was Christ. 5 Nevertheless, God was not pleased with most of them; their bodies were scattered over the desert.
6 Now these things occurred as examples to keep us from setting our hearts on evil things as they did. 7 Do not be idolaters, as some of them were; as it is written: "The people sat down to eat and drink and got up to indulge in pagan revelry." 8 We should not commit sexual immorality, as some of them did-and in one day twenty-three thousand of them died. 9 We should not test the Lord, as some of them did-and were killed by snakes. 10 And do not grumble, as some of them did-and were killed by the destroying angel.
11 These things happened to them as examples and were written down as warnings for us, on whom the fulfillment of the ages has come. 12 So, if you think you are standing firm, be careful that you don't fall!
(NIV)

2 Peter 2:20
If they have escaped the corruption of the world by knowing our Lord and Savior Jesus Christ and are again entangled in it and overcome, they are worse off at the end than they were at the beginning.
(NIV)

2 Peter 3:17-18
Therefore, dear friends, since you already know this, be on your guard so that you may not be carried away by the error of lawless men and fall from your secure position. 18 But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be glory both now and forever! Amen.
(NIV)

Heb 10:26-31
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 a man deserves to be punished who has trampled the Son of God under foot, who has treated as an unholy thing the blood of the covenant that sanctified him, 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. NIV

Rev 3:14-16
"To the angel of the church in Laodicea write:
These are the words of the Amen, the faithful and true witness, the ruler of God's creation. 15 I know your deeds, that you are neither cold nor hot. I wish you were either one or the other! 16 So, because you are lukewarm-neither hot nor cold-I am about to spit you out of my mouth.
(NIV)