Luke 13:3 “Repent, or you will likewise perish.”
Repent means “to turn away from.” We are to turn away from sin, have genuine contrition, and commit to stop sinning with God’s help. For example, what if a wife discovered her husband was having an affair and he pleaded for forgiveness, but after some time he began to beg her to let him resume his affair? Is this repentance? No, this is anti-repentance. If he were truly repentant, he would have wished the affair never happened and would do everything possible to restore his relationship with his wife because of his love for her. So repenting to God is to be truly sorrowful for our sins, turn away from doing them, and live for God instead of our sinful appetites.
Hebrews 10:26-29 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?