I think we don't take advice seriously at first due to the sacrifices we have to make to truly embrace it. Advice gets crap-filtered. This is as it should be,

I think we don't take advice seriously at first due to the sacrifices we have to make to truly embrace it. Advice gets crap-filtered. This is as it should be, because at first you don't really know if it's good advice -- maybe that proverb just doesn't apply in this situation, maybe it's just something that sounds reasonable but isn't actually true, etc. You can be told, "look both ways before you cross the street," but it takes being hit by a car to really convince you to make the sacrifice of abandoning your current thought process whenever you approach a road.