The ImageLegge: Heaven, in its motion, gives the idea of strength. The superior man, in accordance with this, nerves himself to ceaseless activity.
Wilhelm/Baynes: The movement of heaven is full of power. Thus the superior man makes himself strong and untiring.
Blofeld: This hexagram symbolizes the power of the celestial forces in motion, wherewith the Superior Man labors unceasingly to strengthen his own character.
Liu: Heaven moves powerfully; the superior man strengthens himself unceasingly.
Ritsema/Karcher: Heaven moves persistingly. A Chun tzu uses originating strength not to pause.
Cleary(1): The activity of heaven is powerful; superior people thereby strengthen themselves ceaselessly.
Wu: Heaven moves in full strength. Thus the jun zi strives ceaselessly to be self-reliant.