以小人之心度君子之腹 meaning in Chinese

measure the stature of great men by the yardstick of small men; a knave thinks of others in terms of his own desires.; gauge [guess] the heart of a gentle man with one's own mean measure; he has no idea of what the princely man aspires.; like a knave who uses his own yardstick to measure the motive of an upright man; try to estimate what's in the heart of the great with the heart of the mean