Move Mountains!

This idiom means to achieve something very difficult. If you'd move mountains to do something, means you'd make any effort to succeed it.

For example: Rachel kept her faith up, and she has achieved everything she wants to. Faith can move mountains.

I found it out on Long Live by the gorgeous Taylor Swift! There's a part when she says:
" Long Live all the mountains we moved
I had the time of my life
Fighting dragons with you"