Passage
Strive not against a man without cause, when he hath done thee no evil.
Strive not against a man without cause, when he hath done thee no evil.
Proverbs 3:28 Say not to thy friend: Go, and come again: and to morrow I will give to thee: when thou canst give at present.
Proverbs 3:29 Practise not evil against thy friend, when he hath confidence in thee.
Proverbs 3:30 Strive not against a man without cause, when he hath done thee no evil.
Proverbs 3:31 Envy not the unjust man, and do not follow his ways.
Proverbs 3:32 For every mocker is an abomination to the Lord, and his communication is with the simple.
The verse centers on "strive", "against", "without", "cause", "hath", "done", "thee", and "evil". It is saying that the verse draws attention to "strive" and "against", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 29's "Practise not evil against thy friend when..." into verse 31's "Envy not the unjust man and do...", so "strive" and "against" belong inside that flow. In Proverbs context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "strive" and "against" with trust shaped by these words, not by a vague optimism outside the passage.