Jack Bogle, a legendary investment manager and founder of The Vanguard Group, passed away on January 16, 2019, at the age of 89. This article is a tribute to his legacy and influence on the investment industry. The author, an anonymous Jack Bogle disciple, shares their personal experience of being influenced by Bogle's teachings and how he changed the direction of their career. Bogle is credited with creating index funds, which have transformed the way people invest and have benefited countless millions of investors worldwide. The article highlights the impact Bogle had on the industry, including his philosophy of putting the investor first, and includes quotes from David Swensen and others who admire his work. The author expresses gratitude towards Bogle for giving average ordinary people an investment avenue that even the biggest geniuses on the planet have a tough time keeping up with.