Hexagram 34, Dà Zhuàng (Great Power): Line 2
大壮卦九二 · 雷天大壮 · 中文版
九二：贞吉。
The line (Legge)
The second NINE, undivided, shows that with firm correctness there will be good fortune.
Small Image commentary
'The second NINE, (undivided), shows that with firm correctness there will be good fortune:' - this is due to its being in the centre, (and its subject exemplifying the due mean).
象曰：九二贞吉，以中也。
In plain words
Steadfastness brings good fortune. The second line is yang in a yin place, strong but flexible, central in the lower trigram and corresponding to the fifth; in a time of great strength it does not use its strength rashly. The Small Image says this is because it keeps to the middle.
Applying it to your situation
If you are on the rise, this line suggests keeping to the middle and not overreaching because you are strong. What is the right amount of force now?
Position
A solid (yang) line in the second place, which is a yin (even) place, so it is not in its proper place. It holds the centre of the lower trigram. Its partner is line 5; one is yin and the other yang, so they respond to each other.
If this line moves
With this line moving alone, Dà Zhuàng changes into Hexagram 55 Fēng (Abundance). The Jiaoshi Yilin verse for this change (Chinese): 焦氏易林·大壮之丰.
A recorded case from Takashima
Da Zhuang to Feng: leading a company flush with capital: A company president asked about his fortunes and received the second line of Da Zhuang, "steadfastness brings good fortune". Takashima said the company had capital enough to do great things, but its president should temper strength with gentleness and action with calm, work unhurriedly and not chase quick results; in two years, at the fourth line, there would be large profits.
The hexagram
Hexagram 34 Dà Zhuàng (Great Power). The Judgment: Da Zhuang indicates that (under the conditions which it symbolises) it will be advantageous to be firm and correct.
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English text: James Legge, The Yi King (Sacred Books of the East, vol. 16, 1882), public domain, as transcribed by the Chinese Text Project. Chinese: the received text. Offered for study and reflection, not as prediction. Plain-English readings and position notes by this site.