So far I've heard people saying 'it goes to show how much' as a way to use the extent of something to describe another. But then I've also come across 'it goes to how much' and I wonder if there are any differences between them.
For example:
My dad used to scold me a lot but it goes to show how much he cared about me.
My dad used to scold me a lot but it goes to how much he cared about me.