The title comes from research that shows people are happiest on Fridays. Pastor Joel Osteen writes how we can generate this level of contentment and joy every day of the week.<br> Known as a man who maintains a constant positive outlook in spite of circumstances, Osteen has described this message as a core theme of his ministry. Combining his personal experiences with scriptural insights and principles for true happiness, he shows readers how every day can hold the same promise and opportunities for pure joy that they experience at five o'clock on Friday.