Heaven held within the mountain: enormous power, deliberately stored. Dà Chù is the taming of the great — strength accumulated under discipline until it becomes character, the way a mountain holds a sky.
Its counsel favors the daily practice: studying the words and deeds of the past, renewing virtue like chariot drills. Restraint here is not suppression but charging — the halted wagon, the young bull's headboard. Power so gathered eventually opens the very way of heaven.
問Dà Chù speaks of strong feeling held with discipline — passion given structure rather than free rein. Restraint here is not coldness: it is the containment that lets intensity deepen instead of scattering. Its gentlest craft is the fourth line's — meeting impulses early and kindly, before they harden into horns.
Professionally, this is the accumulation phase: building skill, capital, and credibility under deliberate restraint. Daily practice is its explicit method — study the masters, drill the craft. When blocked, treat the removed axle as charging time. Great power tamed becomes public responsibility: not eating at home, but serving at large.
Inwardly, Dà Chù is character-building in the literal sense: strength converted into structure through daily, unglamorous discipline. Its sequencing is wise — redirect drives at the source rather than battling their expressions, restrain the wildness while it is young. The self so cultivated, the final line promises, finds the road suddenly open.
A line speaks only when it is a changing line in your own casting.