Godly sorrow brings repentance that leads to salvation and leaves no regret, but worldly sorrow brings death.

2 Corinthians 7:10
Godly sorrow brings repentance that leads to salvation and leaves no regret, but worldly sorrow brings death.
Sorrow at the old life and old self is the beginning of the journey of realisation of our sins. Then knowing that there is nothing we can do, but Yshua has done everything, will lead us to Him. This is repentance, where knowing that we have sinned, we try to change to the other way.  Also we cannot do this on our own. The Holy Spirit need to help us in this.