Cantonese and Mandarin

Sifu told another analogy comparing learning languages to learning what we do.
He said it is harder for someone who knows Cantonese to learn Mandarin as they are so similar. When someone who is used to speaking Cantonese, it is difficult for them to pronounce the written word in Mandarin as their main habit is to pronounce how they have always done.
Unlike someone who has never tried to learn either language. They have no previous habits to get in the way.

Using the little idea to move is like trying to read from a book where every word is pronounced differently to how you've always said it. This is why you have to slowly train each movement and try and do it with your little idea. Just like when you learn how to pronounce a new word you must enunciate each syllable slowly to practice the word. 

Imagine how difficult it would be if you only said the word at full speed...