With his book "What Do You Need?" Humphrey Isselt offers a guide to answer the essential life question: What do I need? Can the question "What do I need?" be answered in such a way that you know what is expected of you or what you expect from the other person? The question is often asked with the aim of 'being happy'. "What do I need to be happy?" However, people generally do not know what makes them happy. One then strives for short moments in which one strives for desires and wishes (impulses) instead of satisfying what one really needs. What brings me to the next correction of the question: What do you really need in your life? Determining the (own) current need is always the bottleneck in being happy, because it set goals for the long term. What you really need comes from your need at the moment. Not knowing what you need makes you vulnerable, because it makes you susceptible to manipulation. After you have read "What Do You (really) Need" you will have a profound understanding of your need, and live your life accordingly.