What Does Hexagram 34, Lei Tian Da Zhuang (Great Power), Say About Great Strength and Its Limits?

What is Hexagram Lei Tian Da Zhuang and where does it sit among the 64 hexagrams?

Hexagram Lei Tian Da Zhuang is number 34 of the 64 hexagrams of the I Ching in the King Wen sequence, written in Chinese characters as 大壯 and read as Da Zhuang. According to the catalogue of the 64 hexagrams on Wikipedia, hexagram 34 carries the Unicode symbol ䷡, and its name is commonly translated into English as "The Power of the Great" or "Great Power".

The structure has six lines, of which four yang lines occupy the four lowest positions and two yin lines sit at the top. The four yang lines advance together, pushing the two yin lines back above, creating the image of strength gathering upward. This is why the hexagram is named Da Zhuang, meaning great strength.

Why does Hexagram Da Zhuang follow Hexagram Tian Shan Dun?

In the sequence of the Sequence of Hexagrams, hexagram 33 is Tian Shan Dun, meaning retreat and concealment. Hexagram 34 is Da Zhuang, meaning great strength. The two stand side by side as two faces of one situation: once one knows how to retreat in order to preserve oneself, the time comes when accumulated strength has grown great.

Many sources explain the order as things being born and then growing, holding that after retreat there must come a time of renewed flourishing. This reading helps show that Da Zhuang is not a hexagram standing alone but one link in a chain of movement: there are times to yield and times to be strong.

What do the Judgment and the Image of Hexagram Lei Tian Da Zhuang say?

The Judgment of Hexagram Lei Tian Da Zhuang, in the Sino-Vietnamese text given on horos.vn, reads:

大壯：利貞

Da Zhuang: Li Zhen.

Meaning: holding firm is favorable. The Judgment of Da Zhuang is surprisingly short, only the two words Li Zhen. The shorter it is, the more it deserves reflection: the hexagram speaks of a time of great strength, yet the text advises only one thing, that holding firmly to the correct path is what brings favor. Strength without a path to hold it soon collapses.

The Image text from the same source reads:

雷在天上，大壯；君子以非禮弗履

Thunder above heaven, Da Zhuang; the noble person, accordingly, does not tread what is contrary to propriety.

Meaning: thunder above heaven is the image of Hexagram Da Zhuang. The noble person follows it and does not step into what is contrary to propriety. The image of thunder crashing on high is very strong, but it is not something to be used freely. The ancients advised that the more strength one has, the more one must restrain oneself within the bounds of propriety.

One distinction must be made clearly: the oracle verse in the book Khong Minh Than Toan is the verse of a separate divination system, not a line text of the Zhou Yi. That book contains a passage about Hexagram Tian Shui Song with a moving fifth line and mentions the numbers 3, 44, 4, 33, 40, 34, but that is that book's own numbering and has nothing to do with the line texts of Hexagram Da Zhuang. The two systems should not be mixed.

The six line texts of Hexagram Lei Tian Da Zhuang and their plain-language readings

The six lines of Hexagram Da Zhuang repeatedly borrow the image of a ram butting a fence to speak about how people use their strength. The Sino-Vietnamese text and translations below follow horos.vn.

Line 1: strength gathered in the toes

This is a person who, with only a little strength, wants to rush off at once. The strength has gathered only in the lowest part, not yet enough to truly go far, yet the person is already eager to step out. The line text says clearly: advancing now brings misfortune. There is only one way not to ruin the matter, which is to keep sincerity toward what one is doing, accumulate more, and wait for the time to use it.

Line 2: holding firm brings good fortune

Strikingly brief, only two words in the original. This is a person in the middle, with a firm position, who knows self-restraint. Not aggressive, not overbearing, not demanding to prove anything. One simply does the work one needs to do within one's limits. When one has strength yet remains in the right role, that is the ideal image of the whole hexagram. Strength kept inside is the most enduring strength.

Line 3: the ram butting the fence

This is a person who has strength but does not know restraint. Seeing an obstacle, one charges; seeing injustice, one wants to strike; seeing a superior disagree, one wants to confront. The line text distinguishes clearly: the petty person uses strength to butt, the person of scope has no need to use it. The ram butts the fence and its horns are caught so it cannot pull free. Winning a moment of pride can ruin a long process.

It should be said plainly that the distinction between petty person and noble person here carries the social standards of ancient times, when hierarchy and propriety shaped conduct. That is the historical context of the text, not advice to apply directly to life today.

Line 4: the fence opens

This is the beautiful passage of the hexagram. The person in this role has been through the lesson of butting the fence and has learned it. This time one does not use blunt strength but places strength in the right spot: the axle of the great cart, that is, the part that truly bears the load of the work. The fence opens by itself, with no need to break it. Holding to this way will be favorable, and the heart grows lighter.

Line 5: losing the sheep without regret

This line is strange. In a high position, this person loses a sheep in an easy place yet feels no regret. Read in the spirit of the ancient I Ching: one who has reached a high position knows when to let go. A few small losses do not matter compared with holding the larger situation. Knowing how to release the small to keep the great is the mark of a person who has truly matured.

Line 6: the ram stuck at both ends

This is the heaviest consequence of using strength wrongly. The ram butts the fence, and its horns are caught so that it can neither retreat nor advance. Nothing is favorable. The line text leaves only one door open: to know hardship and endure it, to bear difficulty for a time to remedy the situation, after which comes good fortune.

Is Hexagram Lei Tian Da Zhuang auspicious or inauspicious?

Sources do not fully agree in labeling this hexagram as auspicious or inauspicious, and that difference should be stated plainly.

tracuutuvi.com places Da Zhuang among the auspicious hexagrams, carrying the sign that "fortune is about to rise", indicating a coming era of prosperity. But that same page also notes that the prosperous phase does not last, that it is not suited to launching great undertakings, and that the hexagram is good only at the start while difficulties and challenges come later.

horos.vn does not assign an absolute auspicious or inauspicious label but stresses the core spirit: Da Zhuang is not about showing off strength but about knowing how to use strength in the right place.

A balanced reading treats Da Zhuang as a hexagram about momentum, not about outcome. The strong momentum is real, but that very momentum sets the highest demand to keep propriety and keep correctness. Whoever holds to it turns strong momentum into advantage; whoever lets go turns strong momentum into a trap.

How is Hexagram Da Zhuang applied in love and career?

According to the interpretation section on horos.vn, in love, casting Da Zhuang often signals a relationship with strong energy and a leaning toward being the active party. A person in love may see the outward picture as very favorable: the relationship moves fast, can be made public, can reach a major decision. But the warning lies in lines 3 and 6: do not turn being active into coercion. Love that must be fought for, demanded, or proven right often leaves both parties stuck.

In career, the same source holds that Da Zhuang leans toward a phase with momentum: trusted by superiors, given big tasks, respected by colleagues. This is a favorable time to advance, expand scale, or affirm professional standing. But because the hexagram speaks of the limits of strength, what must be kept is not the momentum of advance but the degree of restraint that accompanies it.

Some articles on Da Zhuang within the Ha Lac system are also kept in the I Ching anthology, stressing the image of Thunder above Heaven and the strongly rising initial momentum. The Ha Lac reading places the hexagram in its own calculation system, different from reading the Judgment and line texts purely as Zhou Yi, so the two systems should be distinguished when consulting.

The core lesson of Hexagram Lei Tian Da Zhuang

Da Zhuang speaks of strength, yet all six lines speak of restraining that strength. Line 1 warns against using strength before it is sufficient. Line 2 praises holding firm. Line 3 points out the price of butting straight ahead. Line 4 shows that when strength is placed rightly, the fence opens by itself. Line 5 teaches knowing how to let go of the small. Line 6 paints the scene of being stuck when strength has been misused too long.

Read whole, the message is not about being strong or weak but about strength accompanied by standards, which alone can stand long. Strength without standards leaves only crudeness, and that crudeness creates the very fence it cannot cross.

The structure of Hexagram Lei Tian Da Zhuang in one table