Cain said to God, "Am I my brother's keeper?" after he killed Abel.
Yes, was his answer. And yes is our answer.
Are we speaking when we should be speaking? If we don't say something who will?
God knows our very most secret parts of our hearts. He knows what we are aware of. We can fool even ourselves but we can't fool God.
We must not let people follow destructive ways without putting up a fight for them. They are worth it.