Sui indicates that (under its conditions) there will be great progress and success. But it will be advantageous to be firm and correct. There will (then) be no error.
Image de l'hexagramme Nø 17 :
(The trigram for the waters of) a marsh and (that for) thunder (hidden) in the midst of it form Sui. The superior man in accordance with this, when it is getting toward dark, enters (his house) and rests.