Hexagram 58, Duì (The Joyous Lake): Line 4
兑卦九四 · 兑为泽 · 中文版
九四：商兑，未宁，介疾有喜。
The line (Legge)
The fourth NINE, undivided, shows its subject deliberating about what to seek his pleasure in, and not at rest. He borders on what would be injurious, but there will be cause for joy.
Small Image commentary
'The joy in connexion with (the subject of) the fourth NINE, (undivided): is due to the happiness (which he will produce).
象曰：九四之喜，有庆也。
In plain words
Weighing one joy against another, not at peace; if one shuts out the harm of petty people, there is joy. "The harm" stands for petty people like the third line. The fourth line serves the fifth above and is next to the third below, and wavers between them; if it stays upright and keeps away from the petty, there is joy. The Small Image says its joy is cause for celebration.
Applying it to your situation
If you are torn between two choices, this line suggests keeping away from what would lead you astray. Which choice leaves you more at peace?
Position
A solid (yang) line in the fourth place, which is a yin (even) place, so it is not in its proper place. Its partner is line 1; both are yang, so they do not respond.
If this line moves
With this line moving alone, Duì changes into Hexagram 60 Jié (Limitation). The Jiaoshi Yilin verse for this change (Chinese): 焦氏易林·兑之节.
The hexagram
Hexagram 58 Duì (The Joyous Lake). The Judgment: Dui intimates that (under its conditions) there will be progress and attainment. (But) 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.