Diligent work — represented by the farmer who tills the land — leads to abundance. Following 'vain persons' (empty, worthless, undisciplined companions) leads to poverty. The wisdom here is both practical and relational: what you work at, and who you follow, determine your outcome. The two dangers are idleness and bad company.
Memory phrase: Work hard. Choose wise company.
Talk about it: What happens when you choose to follow lazy or foolish friends?
Prayer: God, help me work hard and not follow lazy or foolish people.