Luke 4:18 The Spirit of the Lord is on me, because he has anointed me to proclaim good news to the poor. He has sent me to proclaim freedom for the prisoners and recovery of sight for the blind, to set the oppressed free
When Jesus got the scroll of the prophet Isaiah handed to Him in the temple, He turned to these words and read them out loud (Isaiah 61)
Jesus came to freely hand out the gospel to anyone who was willing to listen, something He has asked of us too.
We cannot help everyone, the poor, the prisoners, the blind, and the slaves... but we can give them the gospel which will allow them to be set free, just as we are free in God.