ASV notes on Genesis 4:10-15
Cain killed Abel and later in the law of Moses it says blood for blood, the law condemned Cain to be executed, but at the time of Cain the law didn’t exist, and where there is no law God does not held our sin against us, in the beginning there were lawless times. God didn’t want to punish man for what the sin made them do.
God didn’t punish Cain, but the curse came automatic and Cain became an outlaw, when he arrived at places people just chased him to continue and he was in danger of losing his life too. Cain and God still talked to each other and Cain complained that the punishment was too much for him to bear. Cain had just killed his brother, he was a murderer, but God listen to him and helped and protected him. The curse happened, but God still loved Cain.
You can do terrible things, you can steel, you can cheat and even kill, if you go to Jesus and ask for forgiveness God will forgive you and through Jesus God will help you. But this world will not forgive; they will sentence you and put you in prison. But Jesus is in the prison too and ready to help you. Jesus died for our sins, not just for the wrong things we do, but He died for the sin in us.
God explained the name of Jesus to Joseph the husband of Mary and sent an angel for that purpose, let’s look at Matthew 1:20-21,
But after he had considered this, an angel of the Lord appeared to him in a dream, saying, “Joseph, descendant of David, do not be afraid to take Mary as your wife, for the Child who has been [k]conceived in her is of the Holy Spirit. 21 She will give birth to a Son, and you shall name Him Jesus (The Lord is salvation), for He will [l]save His people from their sins.”
ASV short mark on Matthew 1:20-21
The sin is in us, in our heart, we are sinners, but being born again, we are sinners saved by grace. The question is, do we understand this. What are we to be saved from? The angel said “for He will save His people from their sins.” Jesus did save us from our own sins, meaning that our sins is the prison we are in, and to save us from that prison Jesus died on the Cross. Jesus gives us power so we can stop sinning. In the sin-prison there is nothing but sorrow and death, Jesus is the key to the prison gate.