Have you done something against your conscience to survive? My friends. I certainly have.  But I have also done things that even my conscience didn't accuse me. You may laugh because once in a while I often thought of things I had no memories of before I became a Christian. When I was a child, I have taken coins from my mother's desk to get candies from the store, take home a beautiful bottle of nail-polish from a childhood neighbour after playing together. I had no concept of stealing but I was practising it without instructions. I naturally knew how!  

By God's grace, our hearts are changed through the power of the risen Christ as God the father has promised. In Psalm 78: 30-42, the people of Israel, like I said this is probably your least favourite part of the psalm, disappointingly continued sinning after God has rained mana and meat from heaven and gave them what they craved in the wilderness. 

When the judgment was falling upon them, they PRETENDED to praise God but they did not really honour God. When punishment came, false worship will never work. It is the love of God that made us repent, not our self-interests. If I am so scared of being judged so I will try on Christianity. I will never worship God. If God did not prepare Jesus to change our hearts, we would probably never chose him ourselves. However, Jesus obey all his life unto death. He always trusts, always obey, and always give honour and glory to his father. He is our salvation. Salvation belong to the Lord Jesus Christ alone.