Passage
He that separateth himself seeketh [his own] desire, And rageth against all sound wisdom.
He that separateth himself seeketh [his own] desire, And rageth against all sound wisdom.
Proverbs 18:1 He that separateth himself seeketh [his own] desire, And rageth against all sound wisdom.
Proverbs 18:2 A fool hath no delight in understanding, But only that his heart may reveal itself.
Proverbs 18:3 When the wicked cometh, there cometh also contempt, And with ignominy [cometh] reproach.
The verse centers on "separateth", "himself", "seeketh", "desire", "rageth", "against", "sound", and "wisdom". It is saying that the verse draws attention to "separateth" and "himself", so its meaning should be read from those terms before moving to application.
The next verse adds "A fool hath no delight in understanding...", so "separateth" and "himself" should be read forward into that movement. In Proverbs context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "separateth" and "himself" with trust shaped by these words, not by a vague optimism outside the passage.