Wind and thunder strengthening each other: Yì is increase — the expansive season, when what is above pours benefit downward and every undertaking finds a tailwind.
Its ethics of abundance are active: use the time — cross the great water, accomplish great deeds. And conduct the increase as the Image directs: seeing good, imitate it at once; finding faults, drop them. Gain hoarded curdles; the final line's isolated hoarder ends struck from all sides.
問Yì is generosity's hexagram in love: a season when giving multiplies rather than depletes, when benefit extended returns enlarged. Deepen boldly now — the crossing is favored. Its one warning is the last line's: a heart that takes without increasing anyone attracts blows. Keep the wind and thunder mutual, each strengthening the other.
Professionally, Yì is the growth window: resources flowing, leadership disposed to invest downward, the moment for the ambitious project. Move on it — great deeds are explicitly furthered. Sustain it by the hexagram's method: rapid imitation of what works, rapid dropping of what doesn't, and gains shared visibly enough that the increase recruits its own allies.
Inwardly, Yì is the growth mindset this book proposed three millennia early: see good, copy it immediately; see your fault, discard it without ceremony. Even misfortune, its third line says, enriches the sincere. The kind heart that asks no acknowledgment — line five — is the increase that needs no season and fears no reversal.
A line speaks only when it is a changing line in your own casting.