When hundreds of rivers reach the sea from the east, when will they return to the west? If a young man does not work hard, the old man will be miserable. (Han Yuefu "Long Song Xing") To learn a hundred things, one must first make a determination. (Zhu Xi) The edge of a sword comes from sharpening, and the fragrance of plum blossoms comes from the bitter cold. The pen falls in the storm, and the poem becomes weeping ghosts and gods. (Du Fu) If you don't care about Fengya, I will be your teacher. (Du Fu) Be broad-minded and appreciative, accumulate thickly but thinly.