Slu Lin tau ko kuit from red boat

[Hendrik]

Thanks Hendrik. Need your help on the last sentence.

「練習須知」
Training notes

眼要對手。手要對心。
手從心發。一絲不苟。
一伸一縮。柔中帶剛。
剛中而柔。 則是。靜如平波。動如翻江。
若不明攻守之道。皆失過偏弊耳。
Eyes follow hand, hand follows heart.
Hand comes from the heart, without a thread of carelessness.
One extends, one retracts.
Softness carries hardness within. Hardness has softness within.
This is silence like the gentle waves, motion like the raging river.
If you don't understand the method of attack and defence, then mistaken and deaf (??)

Just Mistaken of going extreme. No deaf needed.