Yes! My cello teacher told me “what you can only play slowly, you can eventually play fast; what you can only play wrong, you can’t play at all.” Keep in mind,

Yes! My cello teacher told me “what you can only play slowly, you can eventually play fast; what you can only play wrong, you can’t play at all.” Keep in mind, this is a man who continued playing as a soloist in concert once after breaking his A string by playing high on his D string. You have to know the rules before you can break them well.