LA explained this perfectly for you.
You hinder people from being saved by preaching we cannot believe and obey.
We can help save others.
1 Corinthians 7:16 is about a husband saving his wife, or a wife saving her husband.
1 Peter 3:1 is about winning over---saving the husband with your behavior.
Romans 11:14 is about Paul somehow arousing envy in his own people to save some of them.
for, "Everyone who calls on the name of the Lord will be saved." Romans 10:13
How, then, can they call on the one they have not believed in? And how can they believe in the one of whom they have not heard? And how can they hear without someone preaching to them? Romans 10:14
Then Philip ran up to the chariot and heard the man reading Isaiah the prophet. "Do you understand what you are reading?" Philip asked. Acts 8:30
"How can I," he said, "unless someone explains it to me?" So he invited Philip to come up and sit with him. Acts 8:31.
Of course, we can have something to do with saving others.
Man don't save man.
God does the saving