Mean Streets (1973) includes this quote
Charlie: You don't make up for your sins in church. You do it in the streets. You do it at home. The rest is bullshit and you know it.
What does it mean?
The quote looks pretty self-explanatory. You don't become a good person by praying in church and confessing. You do it by doing good things to people, by treating your family well.
The streets and home are not literal, but metaphorical. They indicate both random strange people (in the street), and loved ones (at home).