The inner essence of worship is cherishing Christ as gain - indeed as more gain than all that life can offer - family, career, retirement, fame, food, friends. The essence of worship is experiencing Christ as gain. Or to use words that we love to use around here: it is savoring Christ, treasuring Christ, being satisfied with Christ.
John Piper (2013). “Brothers, We Are Not Professionals: A Plea to Pastors for Radical Ministry”, p.261, B&H Publishing Group