There are only two groups of people. You either fit into one group or the other. There is no middle ground.
One group of people believes that there is no God, no creator, and thus there is no concept of sin. To them God isn’t. These people believe that our personalities are formed by society and culture. If a person is hostile, rebellious, selfish, dishonest, or angry it is because their needs have not been met by the world somewhere in their past or they’ve been hurt.
To help this first group of people you need to unravel their life like a tangled web of memories trying to find the root of when all the problems began. That process can take years. Because this group believes there is no God, they think there is no one to save them and they need to save themselves.