心无二用

Explanation: Means you have to concentrate, attention must be focused. 　　Usage: The main predicate; as predicate, object, attribute; for human 　　Source: Han Huan Tan, "a new special study of" painting the left side, right hand circle, so that all into the moment, although the implementation of the rules of the heart, back to the Chi chisel hand, and not as persons, not from the heart of dual-use, the hand and are not transported. " 　　Examples: ~ Ancient road. ★ Mingling 濛 beginning "of half an hour Pai An Jing Qi," Volume Thesaurus:  do/try one's best/utmost, s heart endeavor, as ,best one `can not perfectly but as well as one is able to