Practice is essentially repeating our efforts. Practice does make perfect. But only when we clarify the repetition of effort such that we repeat until we learn, and not simply repeat.

Repeating the same mistakes over and over doesn't make us perfect. 

When we have to repeat until we learn, we know to be able to recognise what it is that we have to learn and identify what we will be able to do when we have learnt. 

This means that it isn't just practice that makes perfect, but it is directed practice. Practice that is directed towards specific learnings. 

Repeat until you learn.