What do you mean, fly high and dance?

From the biography of Jin Shu Wei Heng.

Original sentence

Or write hard, if the swan flies high; Or graceful, if tassels hang down, decadent. It is so far away, if the wind is strong and the water is clear, the waves will ripple; Just look, if it's natural. Believing in the legacy of Huangtang is the first of the six arts. Sun Gai used to brush and print, and Cheng Cao used to announce it.

According to the following meaning, you should write calligraphy hard to describe, write as high as a swan, above ordinary people, with charming artistic conception and dancing.