Hexagram 43, Guài (Breakthrough): Line 1
夬卦初九 · 泽天夬 · 中文版
初九：壮于前趾，往不胜为咎。
The line (Legge)
The first NINE, undivided, shows its subject in (the pride of) strength advancing with his toes. He goes forward, but will not succeed. There will be ground for blame.
Small Image commentary
'Without (being able to) succeed, he goes forward:' - this is an error.
象曰：不胜而往，咎也。
In plain words
Strength in the forward toes: going on without being able to win is a fault. In this hexagram five yang lines join to remove the single yin line at the top; the first line is at the bottom, too weak, yet eager to charge ahead. The Small Image says going on when one cannot win is a fault.
Applying it to your situation
If you want to be first to charge at a problem, this line suggests weighing your strength first. How sure are you that you can win if you go now?
Position
A solid (yang) line in the first place, which is a yang (odd) place, so it is in its proper place. Its partner is line 4; both are yang, so they do not respond.
If this line moves
With this line moving alone, Guài changes into Hexagram 28 Dà Guò (Great Exceeding). The Jiaoshi Yilin verse for this change (Chinese): 焦氏易林·夬之大过.
The hexagram
Hexagram 43 Guài (Breakthrough). The Judgment: Guai requires (in him who would fulfil its meaning) the exhibition (of the culprit's guilt) in the royal court, and a sincere and earnest appeal (for sympathy and support), with a consciousness of the peril (involved in cutting off the criminal). He should (also) make announcement in his own city, and show that it will not be well to have recourse at once to arms. (In this way) there will be advantage in whatever he shall go forward to.
Next: Line 2
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.