Yes that's the clear message of the Holy Bible - to repent of our sins.
Jesus came to spiritually regenerate us one by one back into the image of God as Adam was before he sinned. That demands repentance of our sins.
Mat 9:13 But go ye and learn what that meaneth, I will have mercy, and not sacrifice: for I am not come to call the righteous, >>>but sinners to repentance<<<.
Mar 2:17 When Jesus heard it, he saith unto them, They that are whole have no need of the physician, but they that are sick: I came not to call the righteous, but sinners to repentance.
Mar 1:4 John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins.
Luk 24:47 And repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.
Act 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Act 3:19 Repent ye therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord
2Co 12:21 Yes, I am afraid that when I come again, God will humble me in your presence. And I will be grieved because many of you have not given up your old sins. You have not repented of your impurity, sexual immorality, and eagerness for lustful pleasure.