"Yi Qian Bi Hou" (intention before the brush) is central to Xieyi, emphasizing the importance of having a clear vision and intention before painting, so that brushstrokes naturally express the artist's inner feelings and ideas, requiring thoughtful preparation, and guiding brushwork with creativity and personal vision.
"Intention Before the Brush" (yi zai bi xian) is crucial in Xieyi painting, emphasizing that the artist's vision, emotional state, and purpose should guide their brushstrokes, requiring thoughtful preparation and planning while valuing spontaneity, imbuing the artwork with inner spirit and emotional truth.