Thunder resting within the lake: the strong learning to follow the season. Suí is following — the wisdom of adapting to the time, serving what is worthy, and knowing when leading means yielding.
Its ethics are exact: following succeeds only when what you follow is true, and when you follow it wholly. Cling to the easy and lose the strong; serve a genuine good and rest is earned. The Image itself is rest — at nightfall, even thunder goes indoors.
問Suí counsels flexibility in love — letting the relationship set some of the rhythm rather than directing every movement. Its discernment question remains: what are you following, the person's truth or merely their moods? Adapting to what is genuinely good in each other builds a bond; chasing comfort alone, the second line warns, costs you the strong thing.
Professionally, Suí is the art of the good lieutenant and the adaptive strategist: aligning with a worthy leader, a real trend, the time's actual direction. Choose what deserves following, then follow without half-heartedness. Its rhythm teaching matters too — those who serve intensely must also genuinely rest.
Inwardly, Suí is the practice of following what your own deepest judgment names as true, over the louder claims of habit and crowd. It also legitimizes rest as principle, not indulgence: strength that never goes indoors at dusk becomes noise. Flow with what is right, and stop when the day stops.
A line speaks only when it is a changing line in your own casting.