The book of Proverbs provides insight about how to be wise (Proverbs 1:1-7). Proverbs is not primarily a set of rules to follow, but practical wisdom that can be applied to everyday life. This book will teach you and your children to avoid people and situations that will bring harm. For example, verses 1 and 2 of chapter 18 help identify a person who is unfriendly and not to be trusted. Each verse has two lines. The second line compliments the first. So in verse 1 we learn that a person who is unfriendly is selfish. That makes sense. But then in the second line of this verse we find a clue that identifies this selfish person; they start foolish quarrels.
An unfriendly person pursues selfish ends and against all sound judgment starts quarrels.
In verse 2 the pattern is repeated. In the first line we learn that fools, those who despise wisdom, have no interest in understanding. This is confirmed by line 2 which teaches that these fools delight in sharing their own opinion.