Heb 2:3, Heb 12:25, Phil 2:12, 1 Cor 16:22, Rev 14:12
In the Old Testament, God said that even a righteous person will die if he believes in his own righteousness and commits iniquity. (Eze 33:12-13)
Eze 33:12 Therefore, thou son of man, say unto the children of thy people, The righteousness of the righteous shall not deliver him in the day of his transgression: as for the wickedness of the wicked, he shall not fall thereby in the day that he turneth from his wickedness; neither shall the righteous be able to live for his righteousness in the day that he sinneth. 13 When I shall say to the righteous, that he shall surely live; if he trust to his own righteousness, and commit iniquity, all his righteousnesses shall not be remembered; but for his iniquity that he hath committed, he shall die for it.
We must not neglect the great salvation that God has given us. (Heb 2:3, Heb 12:25)
Heb 2:3 How shall we escape, if we neglect so great salvation; which at the first began to be spoken by the Lord, and was confirmed unto us by them that heard him;
Heb 12:25 See that ye refuse not him that speaketh. For if they escaped not who refused him that spake on earth, much more shall not we escape, if we turn away from him that speaketh from heaven:
Therefore, we must believe to the end that Jesus is the Christ and love Him to the end. (Phil 2:12, 1 Corinthians 16:22, Revelation 14:12)
Phil 2:12 Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling.
1 Corinthians 16:22 f any man love not the Lord Jesus Christ, let him be Anathema Maranatha.
Revelation 14:12 Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus.