What does the Bible say about the vanity of earthly pursuits?

The book of Ecclesiastes, especially chapter 2, illustrates that all human endeavors, including wisdom, pleasure, and labor, are ultimately vanity and vexation of spirit. Solomon, having experienced all the wisdom and riches this world offers, concludes that there is nothing of lasting value or satisfaction found in earthly pursuits. He emphasizes that everything man seeks—whether it be knowledge, pleasure, or material wealth—will ultimately be empty without a focus on God's glory and purpose, reminding us that true satisfaction comes only from God's provision for our lives.