The Book of Ecclesiastes is a book in the Old Testament of the Bible, traditionally attributed to King Solomon. It explores the meaning of life and the futility of human endeavors, often emphasizing that many pursuits are ultimately meaningless. The author reflects on the cycles of life, the inevitability of death, and the limitations of human wisdom. Throughout the text, the phrase "vanity of vanities" highlights the transient nature of worldly achievements and pleasures. The book encourages readers to find joy in simple pleasures and to live in accordance with God's will, acknowledging that life’s mysteries may remain unanswered.