Hexagram 42, Yì (Increase): Line 5
益卦九五 · 风雷益 · 中文版
九五：有孚惠心，勿问元吉。有孚惠我德。
The line (Legge)
The fifth NINE, undivided, shows its subject with sincere heart seeking to benefit (all below). There need be no question about it; the result will be great good fortune. (All below) will with sincere heart acknowledge his goodness.
Small Image commentary
'(The ruler) with sincere heart seeks to benefit (all below):' - there need be no question (about the result). '(All below) with sincere heart acknowledge (his goodness):' - he gets what he desires on a great scale.
象曰：有孚惠心，勿问之矣。惠我德，大得志也。
In plain words
With sincerity and a kind heart, there is no need to ask: supreme good fortune. With sincerity, others treasure my virtue. The fifth line is central and correct in the place of honour and truly wishes the people well. The Small Image says there is no need to ask, and others treasuring my virtue means its aims are fully achieved.
Applying it to your situation
If you truly want good for others, this line suggests not keeping count of the return: the response will come. What have you sincerely done for someone lately?
Position
A solid (yang) line in the fifth place, which is a yang (odd) place, so it is in its proper place. It holds the centre of the upper trigram. Its partner is line 2; one is yin and the other yang, so they respond to each other.
If this line moves
With this line moving alone, Yì changes into Hexagram 27 Yí (Nourishment). The Jiaoshi Yilin verse for this change (Chinese): 焦氏易林·益之颐.
A recorded case from Takashima
Yi (Increase) to Yi (Nourishment): adopting an heir: A friend meant to adopt a boy from another family as his heir and received the fifth line of Yi (Increase), "sincere and kind at heart; no need to ask, it is supremely good; sincerely they will repay my kindness". Takashima said a father who gives with a sincere heart will find the son glad to be his son, carrying on his work and repaying him; it was plainly good without asking.
The hexagram
Hexagram 42 Yì (Increase). The Judgment: Yi indicates that (in the state which it denotes) there will be advantage in every movement which shall be undertaken, that it will be advantageous (even) to cross the great stream.
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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.